References
- Patty , R.R. and Lagemann , R.T. 1953 . Spectrochim. Acta , : 60 – 60 .
- Binning , R.C. Jr. and Curtiss , L.A. 1990 . J. comput. Chem. , 11 : 1206 – 1206 .
- Hehre , W.J. , Ditchfield , R. and Pople , J.A. 1972 . J. chem. Phys. , 56 : 2257 – 2257 .
- Frisch , M.J. , Head-Gordon , M. , Trucks , G.W. , Foresman , J.B. , Schlegel , H.B. , Raghavachari , K. , Robb , M. , Binkley , J.S. , Gonzalez , C. , DeFrees , D.J. , Fox , D.J. , Whiteside , R.A. , Seeger , R. , Melius , C.F.J. , Martin , L. , Kahn , L.R. , Stewart , J.J.P. , Topiol , S. and Pople , J.A. 1990 . Gaussian 90, Revision H , Pittsburgh : Gaussian, Inc. .