@article{UZKU_2014_156_4_a2,
     author = {N. P. Evlampiev and A. M. Sidorov and I. E. Philippov},
     title = {On a~generalization of {Ambartsumyan's} equation},
     journal = {U\v{c}\"enye zapiski Kazanskogo universiteta. Seri\^a Fiziko-matemati\v{c}eskie nauki},
     pages = {25--30},
     year = {2014},
     volume = {156},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZKU_2014_156_4_a2/}
}