@article{MAT_1971_15_4_a4,
     author = {M. Schlessinger},
     title = {Functors of {Artin} rings},
     journal = {Matematika},
     pages = {115--129},
     publisher = {mathdoc},
     volume = {15},
     number = {4},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MAT_1971_15_4_a4/}
}