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@article{MV_1965_17_3_a0, author = {M. D. Leko}, title = {On the concept of energy in the classical mechanics and relativity}, journal = {Matemati\v{c}ki vesnik}, pages = {173 }, publisher = {mathdoc}, volume = {17}, number = {3}, year = {1965}, url = {http://geodesic.mathdoc.fr/item/MV_1965_17_3_a0/} }
M. D. Leko. On the concept of energy in the classical mechanics and relativity. Matematički vesnik, Tome 17 (1965) no. 3, p. 173 . http://geodesic.mathdoc.fr/item/MV_1965_17_3_a0/