@article{DAN_1986_288_4_a9,
     author = {V. I. Meleshko and V. M. Zadachin},
     title = {Perturbations of regularized symmetric factorizations and the},
     journal = {Doklady Akademii Nauk},
     pages = {818--823},
     publisher = {mathdoc},
     volume = {288},
     number = {4},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1986_288_4_a9/}
}