Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) 阿部 憲二 and Abe Kenji,Eight Types of Childhood Environments that Actually Produced Serial Killers Based on the Information in Lay Literature and on the Internet,European Journal of Academic Essays,2183-1904,www.euroessays.org,2015,2,6,32-38,https://cir.nii.ac.jp/crid/1390290701119376512,https://doi.org/10.50937/00000438