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