SIUDEK, M. et al. Pi of the Sky Telescopes in Spain and Chile. Acta Polytechnica, [S. l.], v. 51, n. 6, 2011. DOI: 10.14311/1488. Disponível em: https://ojst.is.cvut.cz/ojs/index.php/ap/article/view/1488.. Acesso em: 8 jul. 2025.