Tabulata and Heliolites of the Karaespe horizon. Stratigraphy of Lower Palaeozoic and Silurian deposits of the central Kazakhstan., Stratigraphy of Lower Palaeozoic and Silurian deposits of the central Kazakhstan. Izd 'Nedra' Leningrad 1965: 112-133 4 pls., 1 tab. [In Russian]", 1965: 112-133. Chapter pagination: 112-133. 124 [Zoological Record Volume 102]