@ARTICLE {112,
author={C. R. Paiva and A. Barbosa},
doi={},
journal={IEEE Transactions on Microwave Theory and Techniques},
title={Spectral characterization of self-adjoint problems for layered anisotropic waveguides},
year={1991},
month={February},
volume={39},
number={1},
pages={330-338},
ISSN={0018-9480}
}