@article{MZM_1981_29_2_a9,
     author = {P. Ya. Grushko},
     title = {Bonnet's theorem for geometric structures},
     journal = {Matemati\v{c}eskie zametki},
     pages = {253--264},
     publisher = {mathdoc},
     volume = {29},
     number = {2},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1981_29_2_a9/}
}