BROLIN, Alice. Ambarzumian theorem for quantum graphs with magnetic potential. Mathematica Scandinavica, Berkeley, CA, United States, v. 131, n. 2, 2025. DOI: 10.7146/math.scand.a-157030. Disponível em: https://journals.msp.org/mscand/article/view/19. Acesso em: 24 jul. 2026.