Toughness, hamiltonicity and split graphs. (Friederich-Schiller-Universitat. Forschungsergebnisse der Fakultat für Mathematik und Informatik. Math/93/5.)
A multilayer cellular neural network model of the two pathways of the retina related to dark adaptation. (Katholieke Universiteit Leuven. Department Elektrotechniek. ESAT-SISTA/TR 1993-33I)