@article{MAN_1964__155_161192,
     author = {P.A. GRIFFITHS},
     title = {Deformations of {G-Structures.} {Part} {A:} {General} {Theory} of {Deformations.}},
     journal = {Mathematische Annalen},
     pages = {292--315},
     publisher = {mathdoc},
     volume = {155},
     year = {1964},
     zbl = {0133.15503},
     url = {http://geodesic.mathdoc.fr/item/MAN_1964__155_161192/}
}