On the minimum vector rank of multigraphs. Mitchell, Lon H.; Narayan, Sivaram K.; Rogers, Ian — 2010 ELA. The Electronic Journal of Linear Algebra [electronic only]
Minimum semidefinite rank of outerplanar graphs and the tree cover number. Barioli, Francesco; Fallat, Shaun M.; Mitchell, Lon H.; Narayan, Sivaram K. — 2011 ELA. The Electronic Journal of Linear Algebra [electronic only]