Spectra of weighted rooted graphs having prescribed subgraphs at some levels. Rojo, Oscar; Robbiano, Maria; Cardoso, Domingos M.; Martins, Enide A. — 2011 ELA. The Electronic Journal of Linear Algebra [electronic only]
Spectra of copies of Bethe trees attached to path and applications María Robbiano; I. Gutman; R. Jiménez; B. San Martin — 2008 Bulletin, Classe des Sciences Mathématiques et Naturelles, Sciences mathématiques