Modelling and Knowledge (Re)presentation within HIOS+. - Francois M. H. M. Dupuits; Arie Hasman; Erik M. J. J. Ulrichts (AIME, 1991)

Classification Within HIOS+. - Francois M. H. M. Dupuits; Arie Hasman; Patrick C. M. H. F. Jansen (MIE, 1991)

Advice and Warning within HIOS+. - Francois M. H. M. Dupuits; Arie Hasman; Erik M. J. J. Ulrichts; Jeroen J. M. Valkenburg (MIE, 1991)