@article{SM_1998_189_3_a6,
     author = {P. V. Semenov},
     title = {Fixed-point theorems for a~controlled withdrawal of the convexity of the values of a~set-valued map},
     journal = {Sbornik. Mathematics},
     pages = {461--480},
     publisher = {mathdoc},
     volume = {189},
     number = {3},
     year = {1998},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1998_189_3_a6/}
}