Did stalked echinoderms bioerode calcareous substrates? A possible boring crinoid attachment structure in a stromatoporoid from the early Silurian (Telychian) of EstoniaVinn, Olev; Ausich, William I.; Wilson, Mark A.; Toom, UrsulaPaläontologische Zeitschrift2023 / p. 37-41 https://doi.org/10.1007/s12542-022-00637-3 Early symbiotic rugosan endobionts in stromatoporoidsfrom the Rhuddanian of Estonia (Baltica)Vinn, Olev; Toom, UrsulaLethaia2017 / p. 237-243 : ill http://dx.doi.org/10.1111/let.12190 Late Ordovician and Early Silurian stromatoporoid sponges from Anticosti Island, Eastern Canada : crossing the O/S mass extinction boundaryNestor, Heldur; Copper, Paul; Stock, Carl2010 https://www.ester.ee/record=b2627279*est Строматопороидеи ордовика и силура Эстонии : автореферат ... кандидата геолого-минералогических наукHector, Heldur1964 https://www.ester.ee/record=b1558436*est Строматопороидей ордовика и силура Эстонии : диссертация на соискание ученой степени кандидата геолого-минералогических наукHector, Heldur1964 https://www.ester.ee/record=b2961638*est