@article{TM_1978_148_a24,
     author = {A. V. Yakovlev},
     title = {Galois theory for sheaves of sets},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {253--268},
     year = {1978},
     volume = {148},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1978_148_a24/}
}