‏‫‬‭Non-Euclidean geometry[Book]‏‫‬‭: A critical and historical study of its developments‏‫‬‭‬‭/ Roberto Bonola; Authorized English translation with additional appendices by H. S. Carslaw; With an introduction by Federigo Enriques; With a supplement containing the George Bruce halsted translations of the science of absolute space by John Bolyai and the theory of parallels by Nicholas Lobachevski.
(نان یوکلیدین جیومتریز)