New algorithm and FORTRAN module to carry out the four-index transformation of atomic and molecular physics wholly in central memory. - Carlos F. Bunge; Annik Vivier Bunge; Gerardo Cisneros; Jean-Pierre Daudey (Comput. Chem., 1988)

V4ITD: A portable and efficient FORTRAN implementation of the 4IT algorithm using virtual memory and an external storage device. - Carlos F. Bunge; Annik Vivier Bunge; Gerardo Cisneros; Jean-Pierre Daudey (Comput. Chem., 1988)

E4ITD: A general FORTRAN implementation of the 4IT algorithm. - Gerardo Cisneros; Carlos F. Bunge; Annik Vivier Bunge; Jean-Pierre Daudey (Comput. Chem., 1988)