Kazanskii vestnik, Part XXVI (Feb. & Mar. 1829), Part XXV (April 1829), Part XXVII (Nov. & Dec. 1829); Part XXVIII (Mar. & Apr. 1830); Part XXVIII (July & Aug. 1830). Kazan: University Press, 1829-30." /> LOBACHEVSKII, Nicolai Ivanovitch (1793-1856). "O nachalakh geometrii" [in Russian], in: <I>Kazanskii vestnik</I>, Part XXVI (Feb. & Mar. 1829), Part XXV (April 1829), Part XXVII (Nov. & Dec. 1829); Part XXVIII (Mar. & Apr. 1830); Part XXVIII (July & Aug. 1830). Kazan: University Press, 1829-30. | Christie's