1. The permanental polynomial;Cash;J. Chem. Inf. Comput. Sci.,2000
2. A note on the relations between the permanental and characteristic polynomials of coronoid hydrocarbons;Chen;MATCH Commun. Math. Comput. Chem.,2004
3. Spektren endlicher Grafen;Collat;Abh. Math. Sem. Univ., Hamburg,1957
4. Spectra of Graphs – Theory and Application;Cvetkocić,1980
5. Trees with maximum nullity;Fiorini;Linear Algebra Appl.,2005