TY - JOUR AU - Dimitrije Ugrin-Sparac TI - Lower bounds for sums of powers of different natural numbers expressed as functions of the sum of these numbers. JO - Journal für die reine und angewandte Mathematik PY - 1970 SP - 74 EP - 80 VL - 245 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/JRAM_1970__245_151058/ ID - JRAM_1970__245_151058 ER -