@article{DAN_1978_243_6_a8,
     author = {V. G. Kanovei},
     title = {The essentialness of parameters and the complexity of the fundamental formula of the comprehension scheme in second-order arithmetic},
     journal = {Doklady Akademii Nauk},
     pages = {1384--1386},
     publisher = {mathdoc},
     volume = {243},
     number = {6},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1978_243_6_a8/}
}