@article{1104202033, author = {Vaysburd, I. and Radul, A.}, title = {Nonorientable strings}, journal = {Comm. Math. Phys.}, volume = {135}, number = {2}, year = {1991}, pages = { 413-420}, language = {en}, url = {http://dml.mathdoc.fr/item/1104202033} }
Vaysburd, I.; Radul, A. Nonorientable strings. Comm. Math. Phys., Tome 135 (1991) no. 2, pp. 413-420. http://gdmltest.u-ga.fr/item/1104202033/