Doctoral thesis (2011) - A.A. Beshir (author) , Piet van Mieghem (promotor) , Fernando A. Kuipers (copromotor) , C. Roos (copromotor) , A Orda (copromotor) , P Demeester (copromotor) , CTAM de Laat (copromotor) , R Nuijts (copromotor) , NHG Baken (copromotor)