@article{DAN_1973_210_1_a8,
     author = {S. N. Slugin and V. M. Shashkov},
     title = {Sufficient conditions for the existence of a minimum of a functional generated by a countable system of unbounded operators},
     journal = {Doklady Akademii Nauk},
     pages = {37--39},
     publisher = {mathdoc},
     volume = {210},
     number = {1},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1973_210_1_a8/}
}