FDTD, multiple-region/FDTD, ray-tracing/FDTD: A comparison on their applicability for human exposure evaluation, Bernardi, P., Cavagnaro M., D'Atanasio Paolo, Di Palma E., Pisa S., and Piuzzi E. , International Journal of Numerical Modelling: Electronic Networks, Devices and Fields, Volume 15, Number 5-6 SPEC., p.579-593, (2002)

Multiple-Region Ray-Tracing: Comparison on Their Applicability for Human Exposure Evaluation, Bernardi, P., Cavagnaro M., D'Atanasio Paolo, Di Palma E., Pisa S., and Piuzzi E. , International Journal of Numerical Modelling: Electronic Networks, Devices and Fields, Volume 15, Number 5–6, p.579–593, (2002)

Kirchhoff Ray-tracing: a comparison on their applicability and accuracy, Bernardi, P., Cavagnaro M., D'Atanasio Paolo, Di Palma E., Pisa S., and Piuzzi E. , Number September, p.317–321, (2001)