Recent & Selected Publications
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Near factors of finite groups,
with D. de Caen, I. Hughes, and D. Kreher,
Ars Combin. 29 (1990) 53-63.
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Minimum biclique partitions of the complete multigraph and related designs,
with D. de Caen and D. Pritikin,
Graphs, Matrices and Designs, R.S. Rees, Ed. Dekker 1992.
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Pick's inequality and tournaments,
with S.J. Kirkland and B.L. Shader,
Linear Algebra Appl. 186 (1993) 15-36.
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Skew rank decompositions,
with B.L. Shader and K.N. Vander Meulen,
Linear Algebra Appl. 244 (1996) 123-154.
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Sharp bounds for decompositions of graphs into complete r-partite subgraphs,
with K.N. Vander Meulen,
Jour. Graph Theory 21 (1996) 393-400.
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Singular values of tournament matrices,
with S.J. Kirkland,
Elec. Jour. Linear Algebra 5 (1999) 39-53.
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Biclique decompositions and Hermitian rank,
with V.L. Watts and B.L. Shader,
Linear Algebra Appl. 292 (1999) 267-280.
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Exponents of vertex-transitive digraphs,
with Jian Shen,
Discrete Mathematics 212 (2000) 245-255.
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The spread of the spectrum of a graph,
with D. Hershkowitz and S. Kirkland.
Linear Algebra Appl. 332-334 (2001) 23-35.
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Inertia and biclique decompositions of joins of graphs,
with B. Heyink and K. Vander Meulen.
Jour. Comb. Theory B 88 (2001) 135-151.
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Addressing the Petersen graph,
with R. Elzinga and K. Vander Meulen.
Discrete Mathematics 286 (2004) 241-244.
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Extreme eigenvalues of nonregular graphs,
with S. Cioaba and V. Nikiforov.
Jour. Comb. Theory B 97 (2007) 483-486.
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Large matchings from eigenvalues,
with S. Cioaba.
Linear Algebra Appl. 422 (2007) 308-317.
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Principal eigenvectors of irregular graphs,
with S. Cioaba.
Elec. Jour. Linear Algebra 16 (2007) 366-379.
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Perfect matchings in regular graphs from eigenvalues,
with S. Cioaba and W. Haemers.
Jour. Comb. Theory B 99 (2009) 287-297.