Kan, Daniel M. Abstract homotopy. IV. (English) Zbl 0071.16901 Proc. Natl. Acad. Sci. USA 42, 542-544 (1956). MSC: 55Pxx PDFBibTeX XMLCite \textit{D. M. Kan}, Proc. Natl. Acad. Sci. USA 42, 542--544 (1956; Zbl 0071.16901) Full Text: DOI
Kan, Daniel M. Abstract homotopy. III. (English) Zbl 0071.16801 Proc. Natl. Acad. Sci. USA 42, 419-421 (1956). MSC: 55Pxx PDFBibTeX XMLCite \textit{D. M. Kan}, Proc. Natl. Acad. Sci. USA 42, 419--421 (1956; Zbl 0071.16801) Full Text: DOI
Kan, Daniel M. Abstract homotopy. II. (English) Zbl 0071.16702 Proc. Natl. Acad. Sci. USA 42, 255-258 (1956). MSC: 55Pxx PDFBibTeX XMLCite \textit{D. M. Kan}, Proc. Natl. Acad. Sci. USA 42, 255--258 (1956; Zbl 0071.16702) Full Text: DOI