Fernández Álvarez-Estrada, Ramón and Calvo Padilla, María Luisa (1983) Coupling Of Dielectric Waveguides. In Max Born Cenetenary Conference. Proceedings of the Society Of Photo-Optical Instrumentation Engineers (SPIE) (369). SPIE--The International Society for Optical Engineering, pp. 401-406. ISBN 9780892524044