Zapiski Akademīi nauk po Fiziko-matematicheskomu otdi︠e︡lenīi︠u︡. Mémoires de l'Académie des sciences. Classe physico-mathématique. VIIIe série.
Imperatorskai︠a︡ akademīi︠a︡ nauk (Russia).Fiziko-matematicheskoe otdi︠e︡lenīe.
Petrograd : Tip. Akademīi nauk,
1917.
Science.
Natural history.
Also available on microfilm from University of Michigan, University Library, Preservation Office Microfilming Unit.

Zapiski Imperatorskoĭ akademīi nauk po Fiziko-matematicheskomu otdi︠e︡lenīi︠u︡. VIIIe série
Zapiski Rossīĭskoĭ akademīi nauk po Fiziko-matematicheskomu otdi︠e︡lenīi︠u︡. VIIIe série