Personal Assistance Systems for Professionals, Illustrated by EIS. - H. G. Grünwald; R. Cullen; M. A. M. Leermakers (IFIP Congress (2), 1994)

Design and evaluation of online multimedia maintenance manuals. - Willem-Paul Brinkman; V. P. Buil; R. Cullen; R. Gobits; Floris L. van Nes (Behav. Inf. Technol., 2001)