M. Jungen, ALGORITHM FOR THE 4-INDEX TRANSFORMATION OF PRIMITIVE MOLECULAR INTEGRALS STORED IN TRIPLES, Theoretica Chimica Acta, 88(1), 1994, pp. 69-74
We present an algorithm for the evaluation of the operators J(ij) and
K(ij) as well as for the full four-index transformation from primitive
molecular integrals stored in partially reordered sets of triples (pq
\rs), (pr\qs), (ps\qr) rather than in canonical order.