OTIENO NDINYA, Boniface. Electromagnetic field in a rectangular cavity: an example of second quantization. International Journal of Physical Research, [S. l.], v. 9, n. 1, p. 32–37, 2021. DOI: 10.14419/ijpr.v9i1.31392. Disponível em: https://www.sciencepubco.com/index.php/IJPR/article/view/31392.. Acesso em: 29 apr. 2024.