@article{03949785, title = {Two dimensional lattice vibrations from direct product representations of symmetry groups.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {6}, year = {1983}, pages = {783-794}, doi = {10.1155/S0161171283000666}, zbl = {0591.70023}, language = {en}, url = {http://dml.mathdoc.fr/item/03949785} }
Boyd, J.N.; Raychowdhury, P.N. Two dimensional lattice vibrations from direct product representations of symmetry groups.. International Journal of Mathematics and Mathematical Sciences, Tome 6 (1983) pp. 783-794. doi : 10.1155/S0161171283000666. http://gdmltest.u-ga.fr/item/03949785/