@article{UZKU_2012_154_1_a13,
     author = {O. A. Zadvornov and G. O. Zadvornova},
     title = {On the smoothness properties of the solution of a~nonlinear filtration problem in the presence of a~point source},
     journal = {U\v{c}\"enye zapiski Kazanskogo universiteta. Seri\^a Fiziko-matemati\v{c}eskie nauki},
     pages = {162--166},
     publisher = {mathdoc},
     volume = {154},
     number = {1},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZKU_2012_154_1_a13/}
}