Multiphoton ionization and <i>ab initio</i> calculation of the hydrogen‐bonded clusters (C<sub>5</sub>H<sub>5</sub>N)<sub><i>n</i></sub>(NH<sub>3</sub>)<sub><i>m</i></sub>Yongjun Hu, Xiuyan Wang, Richang Lü et al.|Journal of Mass Spectrometry|2001Cited by 2