E. Tick, B. Massey, F. Rakoczi, and P. Tulayathun. ICLP-Workshops on Implementation of Logic Programming Systems, page 239-254. Kluwer Academic Publishers, Boston, (1993)
Z. Ariola, B. Massey, M. Sami, and E. Tick. ICLP Workshop: Integration of Declarative Paradigms, page 120-134. Max-Planck-Institut für Informatik, Saarbrücken, Germany, (1994)