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