@article{GDZPPN00248515X, title = {A Contraction of S U (2) to the Heisenberg Group.}, journal = {Monatshefte f\"ur Mathematik}, volume = {102}, year = {1986}, pages = {211-226}, zbl = {0588.43007}, url = {http://dml.mathdoc.fr/item/GDZPPN00248515X} }
Ricci, Fulvio. A Contraction of S U (2) to the Heisenberg Group.. Monatshefte für Mathematik, Tome 102 (1986) pp. 211-226. http://gdmltest.u-ga.fr/item/GDZPPN00248515X/