@article{1102991595, author = {Ballantine, C. S.}, title = {Products of positive definite matrices. II.}, journal = {Pacific J. Math.}, volume = {27}, number = {3}, year = {1968}, pages = { 7-17}, language = {en}, url = {http://dml.mathdoc.fr/item/1102991595} }
Ballantine, C. S. Products of positive definite matrices. II.. Pacific J. Math., Tome 27 (1968) no. 3, pp. 7-17. http://gdmltest.u-ga.fr/item/1102991595/