Are the fundamental constants constant?

MLA

Chechev, V. P., and Ya M. Kramarovsky. “Are the Fundamental Constants Constant?” Contemporary Physics, vol. 13, no. 1, Jan. 1972, pp. 61–74. EBSCOhost, https://doi.org/10.1080/00107517208205668.

APA

Chechev, V. P., & Kramarovsky, Y. M. (1972). Are the fundamental constants constant? Contemporary Physics, 13(1), 61–74. https://doi.org/10.1080/00107517208205668

Chicago

Chechev, V. P., and Ya M. Kramarovsky. 1972. “Are the Fundamental Constants Constant?” Contemporary Physics 13 (1): 61–74. doi:10.1080/00107517208205668.