Doctoral thesis (2011) - Z Li (author) , Leonardus P. Ligthart (promotor) , P Huang (copromotor) , A van Ardenne (copromotor) , extern Zhang (copromotor) , R Uijlenhoer (copromotor) , F. le Chevalier (copromotor) , O.A. Krasnov (copromotor) , Piet van Genderen (copromotor)