Media type: E-Article Title: Optical Phonons and Dynamic Charge in Trigonal Se and Te Contributor: Chen, Inan; Zallen, Richard imprint: American Physical Society (APS), 1968 Published in: Physical Review Language: English DOI: 10.1103/physrev.173.833 ISSN: 0031-899X Keywords: General Physics and Astronomy Origination: Footnote: