1. Ballantine, C. S. Products of positive definite matrices. I. (to appear.)
2. Ballantine, C. S. Products of positive definite matrices. II. (to appear.)
3. Ballantine, C. S. A note on the matrix equation H = AP + PA∗. (submitted.)
4. Ballantine, C. S. Triangularizing matrices by ruence. (to appear.)
5. On real eigenvalues of complex matrices;Carlson;Pacific J. Math.,1965