author = { Montgomery, H.E. AND Knight, Robert E. },

title = { Valence bond revisited. Approximate second-order perturbation energies },

publisher = {Elsevier BV},

isbn = {0009-2614},

keywords = { Physical and Theoretical Chemistry , General Physics and Astronomy },

year = {1974},

url = { http://slubdd.de/katalog?TN_libero_mab2 }