@article{DE_1981_17_9_a1,
     author = {G. M. Arhutik},
     title = {Completely integrable partial differential systems of {Riemann} and {Gauss} type},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1548--1561},
     publisher = {mathdoc},
     volume = {17},
     number = {9},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1981_17_9_a1/}
}