Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) KUBO Takeshi and AKATSUKA Takao and SHIGEMITSU Sadahiko and INABA Jun'ichi and IWASAKI Hirokazu,On the identity of several variability indices for fetal heart beats.,Japanese journal of medical electronics and biological engineering,00213292,Japanese Society for Medical and Biological Engineering,1985,23,1,21-28,https://cir.nii.ac.jp/crid/1390282679533972864,https://doi.org/10.11239/jsmbe1963.23.21