BIRGIN, E. G.; MARTÍNEZ, J. M.; RAYDAN, M. Spectral Projected Gradient Methods: Review and Perspectives. Journal of Statistical Software, [S. l.], v. 60, n. 3, p. 1–21, 2014. DOI: 10.18637/jss.v060.i03. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v060i03. Acesso em: 30 nov. 2022.