LOKOT, L. E. EXCITON INSULATOR STATES IN MATERIALS WITH MEXICAN HAT BAND STRUCTURE DISPERSION AND IN GRAPHENE. JOURNAL OF ADVANCES IN PHYSICS, [S. l.], v. 11, n. 1, p. 2927–2949, 2015. DOI: 10.24297/jap.v11i1.6947. Disponível em: https://rajpub.com/index.php/jap/article/view/6947. Acesso em: 18 may. 2024.