@article{MAN_1983__265_163830,
     author = {Kurt Behnke},
     title = {Infinitesimal {Deformations} of {Cusp} {Singularities.}},
     journal = {Mathematische Annalen},
     pages = {407--422},
     publisher = {mathdoc},
     volume = {265},
     year = {1983},
     zbl = {0559.14001},
     url = {http://geodesic.mathdoc.fr/item/MAN_1983__265_163830/}
}