@article{DAN_1979_245_2_a4,
     author = {V. D. Koshmanenko},
     title = {An operator representation for nonclosable quadratic forms and the scattering problem},
     journal = {Doklady Akademii Nauk},
     pages = {295--298},
     publisher = {mathdoc},
     volume = {245},
     number = {2},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1979_245_2_a4/}
}