@article{IVM_1981_2_a1,
     author = {G. D. Velev and P. N. Dushkov},
     title = {Approximate solution of a~class of singular integro-differential equations},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {9--13},
     publisher = {mathdoc},
     number = {2},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1981_2_a1/}
}