Doctoral thesis (2011) - N. Van Oort (author) , PHL Bovy (promotor) , Rob van Nes (copromotor) , IA Hansen (copromotor) , L.H. Immers (copromotor) , NHM Wilson (copromotor) , BR Hellinga (copromotor) , GA Kaper (copromotor) , Bart Van Arem (copromotor)