1. Propagation in curves and twisted waveguides of rectangular cross-section;Lewin;Proc. Inst. Electr. Eng.,1955
2. Polarization transformation in twisted anisotropic media;Van Doeren;I.E.E.E., Trans. Microwave Theory and Tech.,1966
3. Yabe and Mushiake, On EM fields of over-sized rectangular twisted waveguide, Papers of Technical Groups on Microwaves, I.E.C.E., Japan, MW74-90 (Dec. 1974).
4. Propagation in twisted square waveguide;Lewin;I.E.E.E. Trans. Microwave Theory and Tech.,1980