ER. HARISHARAN AGGARWAL, E. S. P. R. ,. Spectrum Calculations for an Orthogonalized Non Linear System. International Journal of Engineering and Computer Science, india, v. 6, n. 6, 2017. Disponível em: http://ijecs.in/index.php/ijecs/article/view/2893. Acesso em: 28 mar. 2024.