@article{01667706,
title = {Gauge symmetries in the Heisenberg model of a magnet.},
journal = {S\'eminaire Lotharingien de Combinatoire [electronic only]},
volume = {27},
year = {1991},
zbl = {1060.82502},
language = {en},
url = {http://dml.mathdoc.fr/item/01667706}
}
Lulek, T.; Florek, W. Gauge symmetries in the Heisenberg model of a magnet.. Séminaire Lotharingien de Combinatoire [electronic only], Tome 27 (1991) . http://gdmltest.u-ga.fr/item/01667706/