On sensitivity analysis for a class of decision systems (revised version). (Working paper of the Laboratory of Operations Research and Decision Systems (LORDS) WP 93-7.)
A numerically exact implementation of the simplex method. (Working paper of the Laboratory of Operations Research and Decision Systems (LORDS) WP 93-10.)
Advanced preprocessing for simplex and interior point algorithms. Discussionsbeitrage des Fachbereichs Wirtschaftwissenschaft der Freien Universität. (Betriebswirtschaftliche, Reihe 13.)