Concepts, Methods and Applications of Quantum Systems in Chemistry and Physics Selected proceedings of QSCP-XXI (Vancouver, BC, Canada, July 2016) - Wang, Yan A.; Wang, Yan A.; Thachuk, Mark; Thachuk, Mark; Krems, Roman; Krems, Roman; Maruani, Jean; Maruani, Jean (Springer International Publishing : Imprint: Springer, 2018)