Whitehead, J. H. C. On incidence matrices, nuclei and homotopy types. (English) Zbl 0063.08227 Ann. Math. (2) 42, 1197-1239 (1941). Not reviewed Cited in 18 Documents PDFBibTeX XMLCite \textit{J. H. C. Whitehead}, Ann. Math. (2) 42, 1197--1239 (1941; Zbl 0063.08227) Full Text: DOI