@article{05237001, title = {A }, journal = {SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]}, volume = {2}, year = {2006}, zbl = {1138.81028}, language = {en}, url = {http://dml.mathdoc.fr/item/05237001} }
Hopkins, Mark J.; Molev, Alexander I. A . SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only], Tome 2 (2006) . http://gdmltest.u-ga.fr/item/05237001/