Chang Won Yoon, Suk Woo Nam, Yeong Cheon Kim, Jong Hee Han, Sung Pil Yoon, Hyoung Juhn Kim, Tae Hoon Lim , Hyung Chul Ham, Jin Young Kim, Sun Hee Choi, Taek Hyun Oh, "Method and apparatus for generating hydrogen from formic acid", USA 10710877, Jul 2020.
Chang Won Yoon, Suk Woo Nam, Yeong Cheon Kim, Jong Hee Han, Sung Pil Yoon, Hyoung Juhn Kim, Tae Hoon Lim , Hyung Chul Ham, Jin Young Kim, Sun Hee Choi, Taek Hyun Oh, "Method and apparatus for generating hydrogen from formic acid", 10-1732881, Apr 2017.