Template:Obut & Sobolevskaya, 1962
- Obut, A.M. & Sobolevskaya, R.F. 1962. Problemy neftegazonosti Sovetskoi Arktiki: Paleontologiya i biostratigrafiya: Graptolity rannego ordovika na Taimyre. Trudy Nautchno-issledovatelskogo instituta geologii Arktiki 127(3), 65–85.