TY - JOUR AU - Ivan Gutman TI - Generalizations Of A Reccurence Relation For The Characteristic Polynomials Of Trees JO - Publications de l'Institut Mathématique PY - 1977 SP - 75 VL - _N_S_21 IS - 35 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/PIM_1977_N_S_21_35_a12/ ID - PIM_1977_N_S_21_35_a12 ER -