Shijo, T.; Rodriguez, L.; Ando, M. The modified surface-normal vectors in the physical optics. Antennas and Propagation, IEEE Transactions on. Dec 2008, 56 (12): 3714–3722. Bibcode:2008ITAP...56.3714S. doi:10.1109/TAP.2008.2007276.
Shijo, T.; Rodriguez, L.; Ando, M. The modified surface-normal vectors in the physical optics. Antennas and Propagation, IEEE Transactions on. Dec 2008, 56 (12): 3714–3722. Bibcode:2008ITAP...56.3714S. doi:10.1109/TAP.2008.2007276.