1. Tournaments;Beineke,1978
2. Nonnegative Matrices in the Mathematical Sciences;Berman,1994
3. On the characteristic roots of tournament matrices;Brauer;Bull. Am. Math. Soc.,1968
4. Problem 31;Brualdi;Discr. Math.,1983
5. Eigenvalues of almost skew-symmetric matrices and tournament matrices;Friedland,1993