Lelek, A.; Mycielski, Jan Some conditions for a mapping to be a covering. (English) Zbl 0103.39204 Fundam. Math. 49, 295-300 (1961). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 6 Documents Keywords:topology PDFBibTeX XMLCite \textit{A. Lelek} and \textit{J. Mycielski}, Fundam. Math. 49, 295--300 (1961; Zbl 0103.39204) Full Text: DOI EuDML