• A crustoid graptolite lithoimmured inside a Middle Ordovician nautiloid conch from Northern EstoniaVinn, Olev; Wilson, Mark A.; Toom, UrsulaAnnales societatis geologorum Poloniae2019 / p. 285-290 : ill https://doi.org/10.14241/asgp.2019.17 https://www.scopus.com/sourceid/17300154911 https://www.scopus.com/record/display.uri?eid=2-s2.0-85077345478&origin=inward&txGid=d88889203f138641ee1cca4c12fbb55c https://jcr.clarivate.com/jcr-jp/journal-profile?journal=ANN%20SOC%20GEOL%20POL&year=2022 https://www.webofscience.com/wos/woscc/full-record/WOS:000504925700003