Cheng, Ting-Jen R.; Chan, Ting-Hao; Tsou, En-Lun; Chang, Shang-Yu; Yun, Wen-Yi; Yang, Pei-Jung; Wu, Ying-Ta; Cheng, Wei-Chieh Chemistry - An Asian Journal, 2013, vol. 8, # 11 p. 2600 - 2604 doi: 10.1002/asia.201300680