@article{DAN_1987_293_5_a0,
     author = {I. Sh. Akhatov and R. K. Gazizov and N. H. Ibragimov},
     title = {Group classification of equations of nonlinear filtration},
     journal = {Doklady Akademii Nauk},
     pages = {1033--1035},
     publisher = {mathdoc},
     volume = {293},
     number = {5},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1987_293_5_a0/}
}