@article{DAN_1978_238_6_a5,
     author = {L. G. Mikhailov},
     title = {On the compatibility of some overdetermined systems of partial differential equations with two unknown functions},
     journal = {Doklady Akademii Nauk},
     pages = {1291--1294},
     publisher = {mathdoc},
     volume = {238},
     number = {6},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1978_238_6_a5/}
}