@article{INTG_1975_7_a2,
     author = {V. F. Kirichenko},
     title = {Deformations of $K$-structures},
     journal = {Itogi Nauki i Tekhniki. Seriya Problemy Geometrii. Trudy Geometricheskogo Seminara},
     pages = {27--37},
     publisher = {mathdoc},
     volume = {7},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTG_1975_7_a2/}
}