@article{MS2_1979__45_166675,
     author = {Jan O. Kleppe},
     title = {Deformations of graded algebras.},
     journal = {Mathematica Scandinavica},
     pages = {205--231},
     publisher = {mathdoc},
     volume = {45},
     year = {1979},
     zbl = {0436.14004},
     url = {http://geodesic.mathdoc.fr/item/MS2_1979__45_166675/}
}