@article{01973852,
title = {Contractions of },
journal = {Beitr\"age zur Algebra und Geometrie},
volume = {44},
year = {2003},
pages = {581-603},
zbl = {1032.22004},
language = {en},
url = {http://dml.mathdoc.fr/item/01973852}
}
Cahen, Benjamin. Contractions of . Beiträge zur Algebra und Geometrie, Tome 44 (2003) pp. 581-603. http://gdmltest.u-ga.fr/item/01973852/