@article{ZVMMF_1986_26_9_a15,
     author = {G. D. Babe and E. L. Gusev},
     title = {On the degeneracy of the necessary conditions of optimality in problems of synthesizing optical interference coatings},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1422--1427},
     publisher = {mathdoc},
     volume = {26},
     number = {9},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1986_26_9_a15/}
}