1. Atmol: M. Guest and V.R. Saunders, Daresbury Laboratory, SRC, Daresbury, Warrington, Cheshire, WA44AD, UK.
2. A program to introduce local symmetry in AB-initio computations of molecules: IBMOL-7
3. Molecule: J. Almlof, University of Stockholm, Institute of Physics, Technical Report, USIP72-09 (1972) and USIP74-29 (1974).