• The asaphid trilobite fauna : its rise and fall in balticaPärnaste, Helje; Bergström, JanPalaeogeography, Palaeoclimatology, Palaeoecology2013 / p. 64 - 77 https://doi.org/10.1016/j.palaeo.2013.06.007 https://www.scopus.com/sourceid/13985 https://www.scopus.com/record/display.uri?eid=2-s2.0-84885835481&origin=resultslist&sort=plf-f&src=s&sot=b&sdt=b&s=DOI%2810.1016%2Fj.palaeo.2013.06.007%29&sessionSearchId=603e590d3e42fd7816bb5e603603c2fd&relpos=0 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=PALAEOGEOGR%20PALAEOCL&year=2013 https://www.webofscience.com/wos/woscc/full-record/WOS:000328445900005
• Biometry and lifestyle of the Ordovician proetide trilobite Cyamella stensioei Owens, 1979Popp, Adrian; Pärnaste, HeljeGFF2011 / p. 111-123 : ill
• Cryptic encrusting fauna inside invertebrate fossils from the Ordovician of EstoniaVinn, Olev; Ernst, Andrej; Toom, Ursula; Isakar, MareAnnales societatis geologorum Poloniae2018 / p. 285-290 : ill https://doi.org/10.14241/asgp.2018.008 https://www.scopus.com/sourceid/17300154911 https://www.scopus.com/record/display.uri?eid=2-s2.0-85062645022&origin=inward&txGid=a470b99b91e29a6a226c44a70e738020 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=ANN%20SOC%20GEOL%20POL&year=2022 https://www.webofscience.com/wos/woscc/full-record/WOS:000454214700004
• Distribution of proetid trilobites in BaltoscandiaPopp, Adrian; Pärnaste, HeljeThe Seventh Baltic Stratigraphical Conference : 17-18 May 2008, Tallinn, Estonia : abstracts & field guide2008 / p. 52
• Distribution of the Proetida (Trilobita) in Baltoscandian Ordovician strataPärnaste, Helje; Popp, Adrian; Owens, Robert M.Estonian journal of earth sciences2009 / 1, p. 10-23 : ill https://artiklid.elnet.ee/record=b1205583*est
• Eestist leiti maailma vanim kivistunud silmEesti Loodus2018 / lk. 7 : fot http://www.ester.ee/record=b1072059*est
• Evidence for cryptic molting behavior in the trilobite Toxochasmops vormsiensis from the Upper Ordovician Katian Kõrgessaare Formation, EstoniaBicknell, Russell D.C.; Vargas-Parra, Ernesto E.; Landman, Neil H.; Pärnaste, HeljeScience of Nature2024 / art. 22 https://doi.org/10.1007/s00114-024-01906-8 https://www.scopus.com/sourceid/21662 https://www.scopus.com/record/display.uri?eid=2-s2.0-85190239089&origin=resultslist&sort=plf-f&src=s&sot=b&sdt=b&s=DOI%2810.1007%2Fs00114-024-01906-8%29&sessionSearchId=a5988ab34905d45619a772ec9079f345&relpos=0 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=SCI%20NAT-HEIDELBERG&year=2023 https://www.webofscience.com/wos/woscc/full-record/WOS:001201792600001
• First record of Telephina (Trilobita) from the Ordovician of northeastern Estonia and its stratigraphical implicationsPärnaste, Helje; Popp, AdrianEstonian journal of earth sciences2011 / 2, p. 83-90 : ill https://artiklid.elnet.ee/record=b2414183*est
• High-resolution trilobite stratigraphy of the Lower–Middle Ordovician Öland Series of BaltoscandiaPärnaste, Helje; Bergström, Jan; Zhiyi, ZhouGeological magazine2013 / p. 509-518 : ill https://pubs.geoscienceworld.org/geolmag/article-abstract/150/3/509/299539/High-resolution-trilobite-stratigraphy-of-the https://doi.org/10.1017/S0016756812000908 https://www.scopus.com/sourceid/26476 https://www.scopus.com/record/display.uri?eid=2-s2.0-84875968844&origin=resultslist&sort=plf-f&src=s&sot=b&sdt=b&s=DOI%2810.1017%2FS0016756812000908%29&sessionSearchId=3efd88b0ac0a1eb956a8fd84ce122338&relpos=0 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=GEOL%20MAG&year=2013 https://www.webofscience.com/wos/woscc/full-record/WOS:000317066800009
• Hirnantia sagittifera (Brachiopoda) and Mucronaspis mucronata s.l. (Trilobita) in the Upper Ordovician of the East Baltic : taxonomy and distributionHints, Linda; Pärnaste, Helje; Gailite, Lilita-IlgaEstonian journal of earth sciences2012 / p. 65-81 : ill https://www.researchgate.net/publication/258439664_Hirnantia_sagittifera_Brachiopoda_and_Mucronaspis_mucronata_sl_Trilobita_in_the_Upper_Ordovician_of_the_East_Baltic_Taxonomy_and_distribution
• Investigating the role of marine redox conditions in an early silurian mass extinction (ireviken event) : a deeper water perspectiveGovert, Daniel J.; Young, Seth, A.; Kaljo, Dimitri; Hints, Olle; Martma, Tõnu; Owens, Jeremy D.; Noble, Paula J.Geological Society of America Abstracts with Programs, vol. 52, no. 22020 / paper no. 32-4 https://doi.org/10.1130/abs/2020SE-344788
• Lower to middle Ordovician trilobite faunas along the Ural border of BalticaPärnaste, Helje; Bergström, JanBulletin of Geosciences2014 / p. 431 - 450 https://doi.org/10.3140/bull.geosci.1448 https://www.scopus.com/sourceid/63670 https://www.scopus.com/record/display.uri?eid=2-s2.0-84901287882&origin=resultslist&sort=plf-f&src=s&sot=b&sdt=b&s=DOI%2810.3140%2Fbull.geosci.1448%29&sessionSearchId=56b7ce5a14becbdd2a7cedba4ac1cb4a&relpos=0 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=B%20GEOSCI&year=2014 https://www.webofscience.com/wos/woscc/full-record/WOS:000336622700019
• On the lower boundary of the Floian Stage in EstoniaPärnaste, Helje; Viira, ViiveEstonian journal of earth sciences2012 / p. 205-209 https://artiklid.elnet.ee/record=b2551998*est
• Ordovician proetid trilobites in Baltoscandia and Germany = Baltoscandia ja Saksamaa Ordoviitsiumi proetiidsed trilobiididPopp, Adrian2011
• Sompast leiti 460 miljonit aastat vana merelooma kivistis : [kommentaar TTÜ geoloogia instituudi vanemteadurilt Helje Pärnastelt]Postimees2011 / lk. 3
• Suurte silmadega väike mereelukas TelephinaPärnaste, HeljeEesti Loodus2012 / lk. 20-23 : ill https://artiklid.elnet.ee/record=b2495111*est
• The earliest cornulitid on the internal surface of the illaenid pygidium from the Middle Ordovician of EstoniaVinn, Olev; Toom, Ursula; Isakar, MareEstonian journal of earth sciences2017 / p. 193-197 : ill https://doi.org/10.3176/earth.2017.19 https://www.scopus.com/sourceid/6000195392 https://www.scopus.com/record/display.uri?eid=2-s2.0-85033595042&origin=inward&txGid=40c12fb6b25417307ab5e19d68dcfdc6 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=EST%20J%20EARTH%20SCI&year=2017 https://www.webofscience.com/wos/woscc/full-record/WOS:000414520500003
• The Early Ordovician trilobite distribution and zonation of the East BalticPärnaste, HeljeProceedings of the Estonian Academy of Sciences. Geology2006 / 2, p. 109-127 : ill
• The lower cambrian trilobite zonation of EstoniaPärnaste, HeljeXI Baltic Stratigraphical Conference : abstracts and field guide2024 / p. 31 https://www.ester.ee/record=b5696260*est https://files.geocollections.info/17aa8067-966a-428d-8bd4-cc22e36cce73.pdf
• Trilobites and biofacies in the Early-Middle Ordovician of Baltica and a brief comparison with the Yangtze PlateBergström, Jan; Pärnaste, Helje; Zhiyi, ZhouEstonian journal of earth sciences2013 / p. 205-230 : ill https://artiklid.elnet.ee/record=b2651566*est https://doi.org/10.3176/earth.2013.16 https://www.scopus.com/sourceid/6000195392 https://www.scopus.com/record/display.uri?eid=2-s2.0-84885847638&origin=resultslist&sort=plf-f&src=s&sot=b&sdt=b&s=DOI%2810.3176%2Fearth.2013.16%29&sessionSearchId=f5537800810c8e1f4bbc115ea06ecda6 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=EST%20J%20EARTH%20SCI&year=2013 https://www.webofscience.com/wos/woscc/full-record/WOS:000327822600002