Symmetry adaptation in molecular ab-initio calculations - an alternative approach. - Michael Ramek; Harald Paulson Fritzer (Comput. Chem., 1981)

New aspects of dynamical damping in ab initio molecular SCF calculations. - Michael Ramek; Harald Paulson Fritzer (Comput. Chem., 1982)

SYMAPPS 1.0: A Software Packet for Group Theoretical Applications to Molecular Symmetry. - Karl Nedwed; Karl Gatterer; Harald Paulson Fritzer (Comput. Chem., 1994)