@article{DAN_1975_221_1_a12,
     author = {V. A. Ivanov and V. D. Chugunov},
     title = {Application of a qualitative theory of functional equations to the study of inhomogeneous petroleum beds and the determination of pressures and outputs of wells},
     journal = {Doklady Akademii Nauk},
     pages = {52--55},
     publisher = {mathdoc},
     volume = {221},
     number = {1},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1975_221_1_a12/}
}