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 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS

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 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS

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 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS

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 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS

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 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS

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 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS

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 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS