title: Comment on "optimization of ground- and excited-state wave functions and van der waals clusters".
authors.affiliation: Département de chimie Université de Montréal C.P. 6128, succursale Centre-ville Montréal (Québec), H3C 3J7, Canada.
authors.forename: X-G
authors.initials: XG
authors.lastname: Wang
authors.forename: T
authors.initials: T
authors.lastname: Carrington