@article{1077475903, author = {Court, N. A.}, title = {Semi-inverse tetrahedrons}, journal = {Duke Math. J.}, volume = {17}, number = {1}, year = {1950}, pages = { 75-81}, language = {en}, url = {http://dml.mathdoc.fr/item/1077475903} }
Court, N. A. Semi-inverse tetrahedrons. Duke Math. J., Tome 17 (1950) no. 1, pp. 75-81. http://gdmltest.u-ga.fr/item/1077475903/