@article{DAN_1967_175_2_a2,
     author = {A. D. Gorbunov},
     title = {Correctness and pseudo-correctness of problems},
     journal = {Doklady Akademii Nauk},
     pages = {269--271},
     publisher = {mathdoc},
     volume = {175},
     number = {2},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1967_175_2_a2/}
}