TY - JOUR AU - Nebojša L. Lažetić TI - Necessary and Sufficient Conditions for a System of Eigenfunctions and Associated Functions of a Sturm-liouville Operator with Discontinuous Coefficients to Possess the Basis Property JO - Publications de l'Institut Mathématique PY - 1985 SP - 119 VL - _N_S_38 IS - 52 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/PIM_1985_N_S_38_52_a16/ LA - en ID - PIM_1985_N_S_38_52_a16 ER -