Veitsman EV. THE PRINCIPLE OF EQUIVALENCE OF ENERGY SPENT ON PROCESS AND OF STEP OF TIME. Int. J. Res. Granthaalayah [Internet]. 2021 Nov. 2 [cited 2025 Nov. 19];9(10):187–190. Available from: https://granthaalayahpublication.org/journals/granthaalayah/article/view/4320