Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) MINOWA Isao,Indirect method observing QHR steps at 900kHz,"2004 Conference on Precision Electromagnetic Measurements Digest, 27^ June-2^ July",,,2004,,,,https://cir.nii.ac.jp/crid/1572261550481036672,