Kunert, Herbert W.2013-09-072009-12-082013-09-072009-09-022009-12-082009-11-29Niyongabo, P 2009, Bound and free excitons in ZnO : optical selection rules in the absence and presence of time reversal symmetry, MSc dissertation, University of Pretoria, Pretoria, viewed yymmdd < http://hdl.handle.net/2263/29919 >E1541/aghttp://hdl.handle.net/2263/29919Dissertation (MSc)--University of Pretoria, 2009.Please read the abstract in the front of the document.© 2009, University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria.Time reversal symmetryExcitons in znoUCTDDissertationhttp://upetd.up.ac.za/thesis/available/etd-11292009-192654/