by Freitas, F.F., De Souza, S.S., Ferreira, L.R.A., Otto, R.B., Alessio, F.J., De Souza, S.N.M., Venturini, O.J., Ando Junior, O.H.
Published in Renewable & sustainable energy reviews (01.03.2019)

by Shoji, M., D'Alessio, F.J.
Published in Proceedings of the IEEE (01.01.1969)