Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Mabuchi Teruhiko and Watanabe Hideaki and Onaka Ryumyo,Surface Phonons of NaF and LiF Films,Journal of the Physical Society of Japan,00319015,THE PHYSICAL SOCIETY OF JAPAN,1987,56,6,2124-2135,https://cir.nii.ac.jp/crid/1390282679164617600,https://doi.org/10.1143/jpsj.56.2124