Singular values of tournament matrices. Gregory, David A.; Kirkland, Stephen J. — 1999 ELA. The Electronic Journal of Linear Algebra [electronic only]
Weighted matrix eigenvalue bounds on the independence number of a graph. Elzinga, Randall J.; Gregory, David A. — 2010 ELA. The Electronic Journal of Linear Algebra [electronic only]
Principal eigenvectors of irregular graphs. Cioabă, Sebastian M.; Gregory, David A. — 2007 ELA. The Electronic Journal of Linear Algebra [electronic only]