@article{IM2_1989_32_3_a6,
     author = {G. E. Mints},
     title = {A~normal form theorem for second-order classical logic with an axiom of choice},
     journal = {Izvestiya. Mathematics },
     pages = {587--605},
     publisher = {mathdoc},
     volume = {32},
     number = {3},
     year = {1989},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1989_32_3_a6/}
}