Doctoral thesis (2003) - PJ van Duijsen (author) , Braham Ferreira (promotor) , PPJ van den Bosch (copromotor) , W Deleroi (copromotor) , Lou Sluis (copromotor) , AJA Vandenput (copromotor) , JW Kolar (copromotor) , JHR Enslin (copromotor) , JJ Smit (copromotor)