Article Tanács, János (2009)
Grasping the Conceptual Difference between János Bolyai and Lobachevskii's Notions of Non-Euclidean Parallelism. Archive for History of Exact Sciences (p. 537). (/isis/citation/CBB000932085/) unapi

Thesis Braver, Seth Philip (2007)
Lobachevski Illuminated: Content, Methods, and Context of the “Theory ofParallels”. (/isis/citation/CBB001560945/) unapi

Article Demirtas, Inanç Akdenizci (2005)
Salih Zeki Introduces Lobachevsky's Geometry: Two Conferences in 1915. Osmanli Bilimi Arastirmalari: Studies in Ottoman Science (pp. 67-78). (/isis/citation/CBB000931405/) unapi

Article Cicenia, Salvatore (2004)
La Geometria Lobacevskiana e la Filosofia della Matematica di Auguste Comte. Nuncius: Annali di Storia della Scienza (p. 121). (/isis/citation/CBB000501347/) unapi

Book Surin, A. V.; Panov, M. I. (2002)
Sud'by tvortsov rossiiskoi nauki. (/isis/citation/CBB000202973/) unapi

Chapter Drago, Antonino; Romano, P. (1994)
Per una nuova concezione della non contraddittorietà di una teoria: Lobacevskij ha dimostrato la coerenza della geometria iperbolica?. In: Logica e filosofia della scienza: Problemi e prospettive: Atti del Congresso triennale della Società Italiana di Logica e Filosofia delle Scienze, Lucca, 7-10 gennaio 1993 (p. 145). (/isis/citation/CBB000045704/) unapi

Article Cicenia, Salvatore (1994)
I problemi fondazionali della geometria in N.I. Lobacevskij. Epistemologia (pp. 13-34). (/isis/citation/CBB000057850/) unapi

Article Fili, Kristina (1992)
“Boobrazhaemaia” geometriia Lobacheskogo i Russkii avangard. (Lobachevskii's “imaginary” geometry and the Russian avant-garde). VIET: Voprosy Istorii Estestvoznaniia i Tekhniki (pp. 43-48). (/isis/citation/CBB000050964/) unapi

Book Gudhov, D.A. (1992)
N.I. Lobachesvskii: Zagadki biografii. (/isis/citation/CBB000045959/) unapi

Article Izotov, G.E. (1992)
K istorii opublikovaniia N.I. Lobachevskii sochinenii po “boobrazhaemoi” geometrii. (On the publishing history of Lobachevskii's work on “imaginary” geometry). VIET: Voprosy Istorii Estestvoznaniia i Tekhniki (pp. 36-43). (/isis/citation/CBB000051064/) unapi

Article Polotovskii, G.M. (1992)
Kto byl ottsom Nikolaia Ivanovicha Lobachevskogo? (Who was Lobachevskii's father)?. VIET: Voprosy Istorii Estestvoznaniia i Tekhniki (pp. 30-36). (/isis/citation/CBB000051148/) unapi

Article Rossi, Francesco Saverio (1983)
Agli albori della geometria non euclidea: Nicola J. Lobačevskij. Cultura e Scuola (pp. 243-262). (/isis/citation/CBB000014366/) unapi

Thesis Duffy, Charles G. (1981)
Nicholas Ivanovich Lobachevsky, philosopher of science. (/isis/citation/CBB001563838/) unapi

Book Karimullin, A. G.; Laptev, B. L. (1979)
Chto chital N. I. Lobachevskii: Zapisi knig i zhurnalov vydannykh N. I. Lobachevskomu iz biblioteki Kazanskogo Universiteta. (What N. I. Lobachevskii read: A list of the books and journals lent to Lobachevskii by Kazan University Library.). (/isis/citation/CBB000005455/) unapi

Book Laptev, Boris L. (1976)
Nikolai Ivanovich Lobachevskii: K 150-letiiu geometrii Lobachevskogo, 1826-1976. (/isis/citation/CBB000022505/) unapi

Book Laptev, Boris L. (1976)
Geometriia Lobachevskogo, ee istoriia i znachenie. (/isis/citation/CBB000022503/) unapi

Book Licis, Nikolajs (1976)
Filosofskoe i nauchnoe znachenie idei N. I. Lobachevskogo. (/isis/citation/CBB000022509/) unapi

Article Medvedev, F. A. (1975)
Ob opredelenii poniatiia funktsii u Lobachevskogo i Dirikhle. (The definition of function by Lobachevski and Dirichlet.). Istoriko-Matematicheskie Issledovaniia (pp. 232-245). (/isis/citation/CBB000012344/) unapi

Article Daniels, Norman (1975)
Lobachevsky: Some anticipations of later views on the relation between geometry and physics. Isis: International Review Devoted to the History of Science and Its Cultural Influences (pp. 75-85). (/isis/citation/CBB000016635/) unapi