Ehresmann, Charles Expansion des systèmes de structures domines. (French) Zbl 0246.18010 C. R. Acad. Sci., Paris, Sér. A 262, 8-11 (1966). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 1 Document MSC: 18D99 Categorical structures PDF BibTeX XML Cite \textit{C. Ehresmann}, C. R. Acad. Sci., Paris, Sér. A 262, 8--11 (1966; Zbl 0246.18010) OpenURL