This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
J. P. Aubin, H. Frankowska, Set-Valued Analysis, Birhäuser, Boston, 1990.Search in Google Scholar
C. Berge, Topological Spaces Including a Treatment of Multi-Valued Functions, Vector Spaces and Convexity, Oliver & Boyd, Edinburgh-London, 1963.Search in Google Scholar
A. Cambini, L. Martein, Generalized convexity and optimization: Theory and Applications, Springer-Verlag, Berlin, 2009.Search in Google Scholar
F. Deutsch, I. Singer, On single-valuedness of convex set-valued maps, Set-Valued Anal., no. 1, 1993, 97-103.Search in Google Scholar
A. Göpfert, H. Riahi, C. Tammer, C. Zălinescu, Variational Methods in Partially Ordered Spaces, Springer-Verlag, New York, 2003.Search in Google Scholar
K. Nikodem, D. Popa, On single-valuedness of set-valued maps satisfying linear inclusions, Banach J. Math. Anal., no. 3, 2009, 44-51.Search in Google Scholar
A. Orzan, A new class of fractional type set-valued functions, Carpathian J. Math., no. 35, 2019, 79-84.Search in Google Scholar
A. Orzan, N. Popovici, Convexity-preserving properties of set-valued ratios of affine functions, Stud. Univ. Babeş-Bolyai Math., no. 66, 2021, 591-602.Search in Google Scholar
U. G. Rothblum, Ratios of affine functions, Math. Program., no. 32, 1985, 357-365.Search in Google Scholar
S. Schaible, Bicriteria quasiconcave programs, Cahiers du Centre d’Etudes de Recherche Oprationnelle, no. 25, 1983, 93-101.Search in Google Scholar
I. M. Stancu-Minasian, Fractional programming. Theory, methods and applications, Mathematics and its Applications, Kluwer-Dordrecht, no. 409, 1997.Search in Google Scholar
D. H. Tan, A note on multivalued affine mappings, Stud. Univ. Babeş-Bolyai Math., Cluj-Napoca, no. 33, 1988, 55-59.Search in Google Scholar
