Borisovich, Yu. G.; Gel’man, B. D.; Myshkis, A. D.; Obukhovskij, V. V. New results in the theory of multivalued mappings. I: Topological characteristics and solvability of operator relations. (English. Russian original) Zbl 0711.55002 J. Sov. Math. 49, No. 1, 800-855 (1990); translation from Itogi Nauki Tekh., Ser. Mat. Anal. 25, 121-195 (1987). MSC: 55M20 55M25 PDFBibTeX XMLCite \textit{Yu. G. Borisovich} et al., J. Sov. Math. 49, No. 1, 800--855 (1990; Zbl 0711.55002); translation from Itogi Nauki Tekh., Ser. Mat. Anal. 25, 121--195 (1987) Full Text: DOI
Borisovich, Yu. G.; Gel’man, B. D.; Myshkis, A. D.; Obukhovskij, V. V. Multivalued mappings. (English) Zbl 0529.54013 J. Sov. Math. 24, 719-791 (1984). MSC: 54C60 54-02 26E25 28B20 54C05 54C65 54H25 PDFBibTeX XMLCite \textit{Yu. G. Borisovich} et al., J. Sov. Math. 24, 719--791 (1984; Zbl 0529.54013) Full Text: DOI