TY - JOUR AU - T. Odzijewicz AU - D. Torres TI - Calculus of Variations with Classical and Fractional Derivatives JO - Mathematica balkanica PY - 2012 SP - 191 VL - 26 IS - 1-2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MABA_2012_26_1-2_a17/ ID - MABA_2012_26_1-2_a17 ER -