SCHNABEL, J.; CARTARIUS, H.; MAIN, J.; WUNNER, G.; HEISS, W. D. SIMPLE MODELS OF THREE COUPLED PT -SYMMETRIC WAVE GUIDES ALLOWING FOR THIRD-ORDER EXCEPTIONAL POINTS. Acta Polytechnica, [S. l.], v. 57, n. 6, p. 454–461, 2017. DOI: 10.14311/AP.2017.57.0454. Disponível em: https://ojs.cvut.cz/ojs/index.php/ap/article/view/4423. Acesso em: 3 may. 2024.