@article{SchmidtGottschling1992, author = {Schmidt, Frank and Gottschling, K.}, title = {Improved Method of Mode Determination in Planar Optical Waveguides Using Line Transmission Approach}, volume = {12}, journal = {J. Opt. Commun.}, number = {3}, pages = {112 -- 114}, year = {1992}, language = {en} }