#A. Berman and R. J. Plemmons, "Nonnegative Matrices in the Mathematical Sciences", Academic Press, 1979 (chapter 2), ISBN 0-12-092250-9#R.A. Horn and C.R.
#A. Berman and R. J. Plemmons, "Nonnegative Matrices in the Mathematical Sciences", Academic Press, 1979 (chapter 2), ISBN 0-12-092250-9#R.A. Horn and C.R.