@article{ZVMMF_1985_25_2_a12,
     author = {V. N. Glushkov and A. Ya. Tsaune},
     title = {Unconditional minimization in eigenvalue problems with additional conditions},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {298--301},
     publisher = {mathdoc},
     volume = {25},
     number = {2},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1985_25_2_a12/}
}