@article{DAN_1968_183_2_a7,
     author = {E. A. Livshitz and B. N. Sadovskii},
     title = {A fixed point theorem for generalized condensing operators},
     journal = {Doklady Akademii Nauk},
     pages = {278--279},
     publisher = {mathdoc},
     volume = {183},
     number = {2},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1968_183_2_a7/}
}