%0 Journal Article
%A M. D. Leko
%T On the concept of energy in the classical mechanics and relativity
%J Matematički vesnik
%D 1965
%P 173 
%V 17
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MV_1965_17_3_a0/
%F MV_1965_17_3_a0