Soo-Chun Chae, Korea Institute of Geoscience and Mineral Resources (KIGAM) (Korea)
; Young-Nam Jang, Korea Institute of Geoscience and Mineral Resources (KIGAM) (Korea)
; In-Kook Bae, Korea Institute of Geoscience and Mineral Resources (KIGAM) (Korea)
; Kyung-Won Ryu, Chungbuk University (Korea)
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