Devide, V. Plane pre-projective geometries. (English) Zbl 0144.19603 Period. Math.-Phys. Astron., II. Ser. 20, 251-260 (1965). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 1 Document Keywords:foundations of geometry, non-Euclidean geometry PDFBibTeX XMLCite \textit{V. Devide}, Period. Math.-Phys. Astron., II. Ser. 20, 251--260 (1965; Zbl 0144.19603)