Clark, R. S. Projective collineations in a space of K-spreads. (English) Zbl 0063.00918 Proc. Camb. Philos. Soc. 41, 210-223 (1945). Not reviewed Cited in 2 Documents PDFBibTeX XMLCite \textit{R. S. Clark}, Proc. Camb. Philos. Soc. 41, 210--223 (1945; Zbl 0063.00918)