[1] D. P. Whitmire. The equivalence of charge and energy. Lettere Al Nuovo Cimento, 1973, 7(8): 305-309.
[2] A. Balcytis.The problem and the methodod of the theory of the generalized chains, in Proceedings of the XIX Lithuanian Republic Scienti]ie-Technical Con/erence (Kaun&s, 1969), p. 2. (1969年是已知最早的)以及
A. Balcytis. On the equivalence of electric charge and energy. Lettere Al Nuovo Cimento, 1974, 10(18): 835-836.