A sparsely encrusted hardground with abundant Trypanites borings from the Llandovery of the Velise River, western Estonia (Baltica)Vinn, Olev; Toom, UrsulaEstonian journal of earth sciences2016 / p. 19-26 : ill Cystoblastus and the origin of the Hemicosmitoida (Echinodermata: Blastozoa)Paul, Christopher R. C.; Toom, UrsulaEstonian journal of earth sciences2021 / p. 165-181 : ill https://doi.org/10.3176/earth.2021.13 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS New camerate crinoid genera from the Upper Ordovician (Katian) of Estonia: evolutionary origin of family Opsiocrinidae and a phylogenetic assessment of Ordovician MonobathridaCole, Selina R.; Toom, UrsulaJournal of systematic palaeontology2019 / p. 597-611 : ill https://doi.org/10.1080/14772019.2018.1447519 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS The diploporite blastozoan Glyptosphaerites (Echinodermata: Blastozoa) and the origin of diploporesPaul, Christopher R. C.; Toom, UrsulaEstonian journal of earth sciences2021 / p. 224-239 : ill https://doi.org/10.3176/earth.2021.15 Journal metrics at Scopus Article at Scopus Проблемы филогении и систематики иглокожих : тезисы докладов VI Всесоюзного симпозимума по иглокожим [21-23 апреля 1987 года]1987 https://www.ester.ee/record=b1349727*est