@article{DE_1989_25_3_a11,
     author = {L. I. Kamynin},
     title = {Smoothness of parabolic {Pagni} potentials. {I}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {477--490},
     publisher = {mathdoc},
     volume = {25},
     number = {3},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1989_25_3_a11/}
}