@article{DE_1991_27_10_a16,
     author = {Ya. V. Radyno and Dinh Phu Bong},
     title = {A free boundary problem for a second-order equation of parabolic type},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1789--1795},
     publisher = {mathdoc},
     volume = {27},
     number = {10},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1991_27_10_a16/}
}