@article{DE_1972_8_6_a11,
     author = {Fan Tang Da},
     title = {A certain integral equation of the smooth transition type},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1058--1067},
     publisher = {mathdoc},
     volume = {8},
     number = {6},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1972_8_6_a11/}
}