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

Development of faunal diversity during the late Llandovery-early Wenlockin the easternmost part of the Baltic Palaeobasin - implications for the Ireviken EventHints, Linda; Pärnaste, Helje; Männik, Peep; Reich, Mike; Rozhnov, SergeyEstonian journal of earth sciences2022 / p. 89-110 : ill https://doi.org/10.3176/earth.2022.07 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

The earliest Ordovician trace fossils Cruziana and Rusophycus from BalticaPärnaste, Helje; Toom, Ursula; Popov, Leonid E.Estonian journal of earth sciences2023 / p. 154 https://doi.org/10.3176/earth.2023.63

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

Growth characteristics of Protoheliolites norvegicus (Tabulata; Upper Ordovician; Estonia)Liang, Kun; Lee, Dong-Jin; Elias, Robert J.; Pärnaste, Helje; Mõtus, Mari-AnnPalaeontology2013 / p. 867 - 891 https://doi.org/10.1111/pala.12022 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS

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

Hirnantian (latest Ordovician) bio- and chemostatigraphy of the Stirnas-18 core, western LatviaHints, Linda; Hints, Olle; Kaljo, Dimitri; Kiipli, Tarmo; Männik, Peep; Nõlvak, Jaak; Pärnaste, HeljeEstonian journal of earth sciences2010 / p. 1-24 : ill https://artiklid.elnet.ee/record=b2739538*est

Institute of Geology 2004-2005 : [annual report]Pärnaste, Helje2006 https://www.ester.ee/record=b1631976*est

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

Suurte silmadega väike mereelukas TelephinaPärnaste, HeljeEesti Loodus2012 / lk. 20-23 : ill https://artiklid.elnet.ee/record=b2495111*est

Terminal Ordovician stratigraphy of the Siljan district, SwedenEbbestad, Jan Ove R.; Högström, Anette E. S.; Frisk, Åsa M.; Martma, Tõnu; Kröger, Björn; Kaljo, Dimitri; Pärnaste, HeljeGFF2015 / p. 36 - 56 https://doi.org/10.1080/11035897.2014.945620 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 late Sandbian/Early Katian carbonate succession in the eastern St.Petersburgregion: the stratigraphic record in the Krapivno The late Sandbian/Early Katian carbonate succession in the eastern St. Petersburg region: the stratigraphic record in the Krapivno 21 drill core 21 drill coreHints, Linda; Lehnert, Oliver; Nõlvak, Jaak; Männik, Peep; Pärnaste, Helje; Joachimski, Michael M.XI Baltic Stratigraphical Conference : abstracts and field guide2024 / p. 13 https://www.ester.ee/record=b5696260*est https://files.geocollections.info/16c906be-0636-4d30-95fe-065c76cc887a.pdf

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