FASSARELLA, Lucio. Characterization of Positive Operators. Latin American Journal of Mathematics, [S. l.], v. 2, n. 01, p. 1–11, 2023. DOI: 10.14244/lajm.v2i01.12. Disponível em: https://lajm.ufscar.br/index.php/capa/article/view/12. Acesso em: 27 dec. 2024.