@article{1183506773, author = {DeCicco, John}, title = {The pseudo-angle in space of $2n$ dimensions}, journal = {Bull. Amer. Math. Soc.}, volume = {51}, number = {11}, year = {1945}, pages = { 162-168}, language = {en}, url = {http://dml.mathdoc.fr/item/1183506773} }
DeCicco, John. The pseudo-angle in space of $2n$ dimensions. Bull. Amer. Math. Soc., Tome 51 (1945) no. 11, pp. 162-168. http://gdmltest.u-ga.fr/item/1183506773/