@article{IM2_1995_59_1_a8,
     author = {A. A. Razborov},
     title = {Unprovability of lower bounds on circuit size in certain fragments of bounded arithmetic},
     journal = {Izvestiya. Mathematics},
     pages = {205--227},
     year = {1995},
     volume = {59},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1995_59_1_a8/}
}