@article{IM2_1975_9_1_a3,
     author = {F. L. Zak},
     title = {$q$-finite morphisms in formal algebraic geometry},
     journal = {Izvestiya. Mathematics},
     pages = {27--62},
     year = {1975},
     volume = {9},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1975_9_1_a3/}
}