CHEN, Yuming. Spectral Theory in Compact Operators. Science and Technology of Engineering, Chemistry and Environmental Protection, [S. l.], v. 2, n. 6, p. 5372, 2024. DOI: 10.61173/2akk6f70. Disponível em: https://stecep.deanfrancis.press/article/view/1115. Acesso em: 4 nov. 2026.