@article{1183500873, author = {Thrall, R. M.}, title = {Apolarity of trilinear forms and pencils of bilinear forms}, journal = {Bull. Amer. Math. Soc.}, volume = {44}, number = {11}, year = {1938}, pages = { 678-683}, language = {en}, url = {http://dml.mathdoc.fr/item/1183500873} }
Thrall, R. M. Apolarity of trilinear forms and pencils of bilinear forms. Bull. Amer. Math. Soc., Tome 44 (1938) no. 11, pp. 678-683. http://gdmltest.u-ga.fr/item/1183500873/