@incollection{Vasconcelos20, author = {Helena Cristina Vasconcelos}, title = {Optical Waveguides Based on Sol-Gel Coatings}, booktitle = {Electromagnetic Propagation and Waveguides in Photonics and Microwave Engineering}, publisher = {IntechOpen}, address = {Rijeka}, year = {2020}, editor = {Patrick Steglich}, chapter = {3}, doi = {10.5772/intechopen.91993}, url = {https://doi.org/10.5772/intechopen.91993} }