Doctoral thesis (2003) - L Breebaart (author) , Henk J. Sips (promotor) , HE Bal (copromotor) , Wim Vree (copromotor) , HAG Wijshoff (copromotor) , Arie van van Deursen (copromotor) , EM Paalvast (copromotor) , C van Reeuwijk (copromotor) , Jan L.G. Dietz (copromotor)