1. Three types of matrix stability
2. F. R. Gantmacher, The theory of matrices. Vols. 1, Translated by K. A. Hirsch, Chelsea Publishing Co., New York, 1959, 32–21:6372c
3. Global Stability in Many-Species Systems
4. Thomas Muir, A treatise on the theory of determinants, Revised and enlarged by William H. Metzler, Dover Publications Inc., New York, 1960, 166–22:5644
5. On the existence of positive diagonal<tex>P</tex>such that<tex>PA + A^{T}P < 0</tex>