However, Nessov himself (ref. #13), in:
Nessov, L. A. 1991. Gigantic pterosaurs of the family Azhdarchidae. I.
Morphology and taxonomy. Bulletin of Leningrad University, Series 7, Geology
and Geography 2:13-23.
...cites something in Russian that I can't read -- may or may not be the
same thing; it's got the same year, and three authors, but the initials &
several letters in the names don't match; no page numbers are given, and the
journal name appears to be abbreviated:
ÐÐÑÐÐ Ð.Ð., ÐÐÐÐÐÐÐÐ, Ð.Ð., ÐÑÐÐÐÑÐÐÐÐ, Ð.Ð. ÐÐÐÑÐ ÐÐÑÑÐÐÐÑÐÐÐÐÐÐÑ Ð ÑÐÐÐÐÐÑ
ÑÐÑÐÐÑÐÐÐÐÐÑ ÐÐÑÐÐÑÑÑÑ ÑÐÑÑÐÑÐÑÐÐ // ÐÐÐ. ÐÐÐÐ. ÐÑÑÐ. 1987. No. 4.