@article{1103857673, author = {Wehrl, A.}, title = {Spin waves and the BCS model}, journal = {Comm. Math. Phys.}, volume = {20}, number = {1}, year = {1971}, pages = { 319-342}, language = {en}, url = {http://dml.mathdoc.fr/item/1103857673} }
Wehrl, A. Spin waves and the BCS model. Comm. Math. Phys., Tome 20 (1971) no. 1, pp. 319-342. http://gdmltest.u-ga.fr/item/1103857673/