APA (7th ed.) Citation

Lobachevskii, N. I. (1891). Geometrical researches on the theory of parallels. University of Texas.

Chicago Style (17th ed.) Citation

Lobachevskii, Nikolai Ivanovich. Geometrical Researches on the Theory of Parallels. Austin: University of Texas, 1891.

MLA (8th ed.) Citation

Lobachevskii, Nikolai Ivanovich. Geometrical Researches on the Theory of Parallels. University of Texas, 1891.

Warning: These citations may not always be 100% accurate.