Polynova, G. 2016. An account of the activity of the secret toadhead agama (<em>Phrynocephalus mystaceus mystaceus</em> Pall. 1776) during assessments of its population. Biological Communications. 3 (Sep. 2016), 120–125. DOI:https://doi.org/10.21638/11701/spbu03.2016.320.