Transition and alkali metal complex ternary amides for ammonia synthesis and decomposition, Hujun Cao, Jianping Guo, Fei Chang, Claudio Pistidda, Wei Zhou, Xilun Zhang, Antonio Santoru, Hui Wu, Norbert Schell, Rainer Niewa, Ping Chen, Thomas Klassen, Martin Dornheim, Chemistry-A European Journal, 2017, 23, 9766-9771.