@article{MAN_1982__259_163649,
     author = {Klaus Wirthm\"uller},
     title = {Deformations of {Fat} {Points} of {Boardman} {Type} 2,0.},
     journal = {Mathematische Annalen},
     pages = {519--540},
     year = {1982},
     volume = {259},
     zbl = {0469.32009},
     url = {http://geodesic.mathdoc.fr/item/MAN_1982__259_163649/}
}