New Models to Estimate Daytime and Shadow Length by Tracking the Shadow. International Journal of Psychosocial Rehabilitation, [S. l.], v. 24, n. 5, p. 3989–4000, 2020. DOI: 10.61841/y8922q35. Disponível em: https://www.psychosocial.com/index.php/ijpr/article/view/5122. Acesso em: 23 jul. 2025.