Book Alberto Cogliati (2024)
La geometria non euclidea. Una breve storia dall’antichità a Poincaré. (/isis/citation/CBB276091257/) unapi

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

Book Gray, Jeremy J. (2004)
János Bolyai, Non-Euclidean Geometry, and the Nature of Space. (/isis/citation/CBB000750880/) unapi

Article Kiss, Elemér (1999)
Notes on János Bolyai's researches in number theory. Historia Mathematica (pp. 68-76). (/isis/citation/CBB000082268/) unapi

Book Kiss, Elemér (1999)
Matematical gems from the Boylai chests: János Bolyai's discoveries in number theory and algebra as recently deciphered from his manuscripts. (/isis/citation/CBB000082267/) unapi

Book Bolyai, Janos (1987)
Appendix: The theory of space. With introduction, comments, and addenda edited by Kárteszi, Ferenc. Supplement by Barna Szénássy. (/isis/citation/CBB000032165/) unapi

Book Alexits, György (1977)
Bolyai János világa. (/isis/citation/CBB000014253/) unapi

Book Bólyai, Farkas; Bólyai, János (1975)
Bólyai-levelek. Válogatta, a bevezetö tanulmányt írta és a jegyzeteket összeállította Benkö Samu. (/isis/citation/CBB000013826/) unapi