Piskun, 1974b
From dinoflaj3
Piskun, L.V., 1974b: Paleontologicheskaya kharakteristika siluriiskikh otlozhenii Brestskoi vpadiny. In: Vozzhennikova, T.F., Timofeev, B.V., and Sheshegova, L.I. (editors), Microfossilii SSSR; Akademiya Nauk SSSR, Sibirkoe Otdelenie, Trudy Insituta Geologii i Geofiziki, Novosibirsk, v.81, p.30-36.