@article{SEMR_2019_16_a97,
     author = {E. P. Volokitin and V. M. Cheresiz},
     title = {An integrating factor of the {Darboux} differential systems},
     journal = {Sibirskie \`elektronnye matemati\v{c}eskie izvesti\^a},
     pages = {1260--1275},
     publisher = {mathdoc},
     volume = {16},
     year = {2019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/SEMR_2019_16_a97/}
}