The earliest Ordovician trace fossils Cruziana and Rusophycus from Baltica
Pärnaste, Helje
;
Toom, Ursula
;
Popov, Leonid E.
Estonian journal of earth sciences
2023
/
p. 154
https://doi.org/10.3176/earth.2023.63
The lower cambrian trilobite zonation of Estonia
Pärnaste, Helje
XI Baltic Stratigraphical Conference : abstracts and field guide
2024
/
p. 31
https://www.ester.ee/record=b5696260*est
https://files.geocollections.info/17aa8067-966a-428d-8bd4-cc22e36cce73.pdf