%% -*-BibTeX-*- @Article{HePe02, author = "J. van den Heuvel and S. Pejicacute", title = "Using {L}aplacian eigenvalues and eigenvectors in the analysis of frequency assignment problems", journal = "Annals of Operations Research", volume = "107", number = "1--4", pages = "349--368", year = "2002", URL = "http://ipsapp007.lwwonline.com/content/getfile/4495/39/21/abstract.htm", language = "English", }