Ostrom, T. G. Derivable nets. (English) Zbl 0137.40203 Can. Math. Bull. 8, 601-613 (1965). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 9 Documents Keywords:foundations of geometry, non-Euclidean geometry PDF BibTeX XML Cite \textit{T. G. Ostrom}, Can. Math. Bull. 8, 601--613 (1965; Zbl 0137.40203) Full Text: DOI