CheMPS2: A free open-source spin-adapted implementation of the density matrix renormalization group for ab initio quantum chemistry. - Sebastian Wouters; Ward Poelmans; Paul W. Ayers; Dimitri Van Neck (Comput. Phys. Commun., 2014)

CheMPS2: Improved DMRG-SCF routine and correlation functions. - Sebastian Wouters; Ward Poelmans; Stijn De Baerdemacker; Paul W. Ayers; Dimitri Van Neck (Comput. Phys. Commun., 2015)