Izrailevich, Ya. A. On the notion of relative rotation of a multivalued vector field. (Russian) Zbl 0266.47049 Trudy Sem. funkcional. Analizu 12, Voronez, 111-115 (1969). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 1 Document MSC: 47H10 Fixed-point theorems 55M25 Degree, winding number × Cite Format Result Cite Review PDF