Byeon 2023. Byeon Pyeong-seop (변평섭) (2023-07-07). "김갑순, 교도소 심부름꾼에서 대전 땅 절반 소유 땅부자로" [Kim Gap-sun, from a prison errand boy to a landowner who owns half of the land in Daejeon]. Chungcheongnam-do government. ; Byeon Pyeong-seop is the former director of Chungnam History and Culture Research Institute.