@article{MMO_1978_36_a7,
     author = {V. I. Opoǐcev},
     title = {Generalization of the theory of monotone and concave operators},
     journal = {Trudy Moskovskogo matemati\v{c}eskogo ob\^{s}estva},
     pages = {237--273},
     publisher = {mathdoc},
     volume = {36},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MMO_1978_36_a7/}
}