1. Generalized exponents of primitive directed graphs;Brualdi;J. Graph Theory,1990
2. Combinatorial Matrix Theory;Brualdi,1991
3. Generalized exponents of primitive matrices;Liu,1992
4. Generalized exponents of primitive simple graphs;Liu;Acta Math. Appl. Sinica,1993
5. The exponent set of symmetric primitive (0, 1) matrices with zero trace;Liu;Linear Algebra Appl.,1990