@article{1104114124, author = {Araki, Huzihiro and Matsui, Taku}, title = {Ground states of the $XY$-model}, journal = {Comm. Math. Phys.}, volume = {97}, number = {3}, year = {1985}, pages = { 213-245}, language = {en}, url = {http://dml.mathdoc.fr/item/1104114124} }
Araki, Huzihiro; Matsui, Taku. Ground states of the $XY$-model. Comm. Math. Phys., Tome 97 (1985) no. 3, pp. 213-245. http://gdmltest.u-ga.fr/item/1104114124/