Vinogradov, A. M. On the second obstruction to cross-sections. (English. Russian original) Zbl 0118.18701 Sov. Math., Dokl. 1, 85-87 (1960); translation from Dokl. Akad. Nauk SSSR 130, 723-725 (1960). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Keywords:topology PDF BibTeX XML Cite \textit{A. M. Vinogradov}, Sov. Math., Dokl. 1, 85--87 (1960; Zbl 0118.18701); translation from Dokl. Akad. Nauk SSSR 130, 723--725 (1960)