Ab Initio Spin-Free Valence Bond Program

XIAMEN-99 - AN AB INITIO SPIN-FREE VALENCE BOND PROGRAM 

Xiamen-99 is an ab initio spin-free valence bond package. It is based on the 

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Wei Wu, Lingchun Song, Yirong Mo, and Qianer Zhang, XIAMEN -- An Ab Initio Spin-free Valence Bond Program, Department of Chemistry, The State Key Laboratory for Physical Chemistry of Solid Surfaces, and Institute of Physical Chemistry, Xiamen University, Xiamen, 361005,... 

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