[1] M. Fiedler V. Pták:
On Matrices with Non-positive Off-diagonal Elements and Positive Principal Minors. Czech. Math. J. 87 (1962), 382-400.
MR 0142565
[4] Д. M. Котелянский:
Осонки для определителей матриц с преобладающей главной диагоналю. Изь. АН СССР ser. mat. 20 (1956), 137-144.
MR 0075917 |
Zbl 0995.90522
[6] V. Pták:
On a Combinatorial Theorem and Its Application to Nonnegative Matrices. Czech. Math. J. 83 (1958), 487-495.
MR 0110644
[7] V. Pták J. Sedláček:
On the Index of Imprimitivity of Nonnegative Matrices. Czech. Math. J. 83 (1958), 495-501.
MR 0110645