RUNKA , Henryk J. Quadratically constrained quadratic problems and cone optimization. Studia Oeconomica Posnaniensia, Poznan, Polska, v. 1, n. 10, p. s. 84–106, 2013. DOI: 10.18559/mnndat61. Disponível em: https://journals.ue.poznan.pl/soep/article/view/3327. Acesso em: 3 sep. 2026.