M. Kuneva, S. Tonchev, & K. Christova. (2021). Phase Composition and Stress in Proton Exchanged Waveguide Layers in LiNbO3 and LiTaO3. Newest Updates in Physical Science Research Vol. 5, 140–151. https://doi.org/10.9734/bpi/nupsr/v5/2074F