Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Hieda Mitsunori and Matsuda Kenji and Kato Tsuyoshi and Matsushita Taku and Wada Nobuo,Extremely High Frequency Dependence of Two-Dimensional Superfluid Onset,Journal of the Physical Society of Japan,0031-9015,THE PHYSICAL SOCIETY OF JAPAN,2009,78,3,033604-033604,https://cir.nii.ac.jp/crid/1390282679173264128,https://doi.org/10.1143/jpsj.78.033604