@article{DE_2004_40_6_a13,
     author = {S. V. Zhestkov and P. P. Zabreiko},
     title = {On the {Fixed} {Point} {Principle} for {Matrix} {Partial} {Differential} {Systems} of {Fedorov--Riccati} {Type}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {840--843},
     publisher = {mathdoc},
     volume = {40},
     number = {6},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2004_40_6_a13/}
}