†Kotujotreta Ushatinskaya 1994

Ushatinskaya 1994. New Middle and Upper Cambrian acrotretids (Brachiopoda) from the northern part of the Siberian platform, and some questions of their systematics. Paleontologicheskii Zhurnal, 4, Oktyabr'-Noyabr'-Dekabr' 1994: 38-54