ŚCIĘŻOR, Tomasz. Overnight measurements of the sky brightness as a method for assessing the cloudiness. Photonics Letters of Poland, [S. l.], v. 11, n. 3, p. 72–74, 2019. DOI: 10.4302/plp.v11i3.913. Disponível em: https://photonics.pl/PLP/index.php/letters/article/view/11-23. Acesso em: 24 feb. 2024.