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2. Berman, A., M. Neumann, and R.J. Stern, Nonnegative Matrices in Dynamic Systems, Wiley, New York.
3. Berman, A. and R.J. Plemmons, Nonnegative Matrices in the Mathematical Sciences, Academic Press, New York, 1979.
4. Berman, A. and D.B. Saunders, “Matrices with Zero Line Sums,” Linear Algebra and its Applications 40 (1981), 229–235.
5. Berman, A. and R.J. Stern, “Linear Feedback, Irreducibility and M-Matrices,” Linear Algebra and its Applications to appear.