[1]
Berman, A., Friedland, S., Hogben, L., Rothblum, U.G. and Shader, B. 2008. Minimum Rank of Matrices Described by a Graph or Pattern over the Rational, Real and Complex Numbers. The Electronic Journal of Combinatorics. 15, 1 (Feb. 2008), #R25. DOI:https://doi.org/10.37236/749.