PETRE, Péter. IMPROVEMENT OF THE RATE OF CONVERGENCE OF THE CONJUGATE GRADIENT FAST FOURIER TRANSFORM METHOD FOR ANALYZING PLANAR FREQUENCY SELECTIVE SURFACES Periodica Polytechnica Electrical Engineering, [S. l.], v. 34, n. 2, p. 85–97, 1990. Disponível em: https://pp.bme.hu/ee/article/view/4560. Acesso em: 17 may. 2024.