Webb, J. R. L. On degree theory for multivalued mappings and applications. (English) Zbl 0293.47021 Boll. Unione Mat. Ital., IV. Ser. 9, 137-158 (1974). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 4 ReviewsCited in 15 Documents MSC: 47J05 Equations involving nonlinear operators (general) 55M25 Degree, winding number 54C60 Set-valued maps in general topology PDFBibTeX XMLCite \textit{J. R. L. Webb}, Boll. Unione Mat. Ital., IV. Ser. 9, 137--158 (1974; Zbl 0293.47021)