AUTOMATIC SOLAR TRACKING SYSTEM. Journal of Pharmaceutical Negative Results, [S. l.], p. 1849–1855, 2023. DOI: 10.47750/pnr.2023.14.S02.222. Disponível em: https://www.pnrjournal.com/index.php/home/article/view/7607.. Acesso em: 3 jun. 2026.