Nurfitri Abdul Gafur, Masayuki Sakakibara, Satoru Komatsu, Sakae Sano, Koichiro Sera. Environmental Survey of the Distribution and Metal Contents of Pteris vittata in Arsenic-Lead-Mercury-Contaminated Gold Mining Areas along the Bone River in Gorontalo Province, Indonesia. International journal of environmental research and public health. 2022. 19. 1