http://public.eblib.com/EBLPublic/PublicView.do?ptiID=364072
http://site.ebrary.com/id/10252126
http://www.myilibrary.com?id=177379
http://www.netlibrary.com/urlapi.asp?action=summary&v=1&bookid=245162
http://dx.doi.org/10.1007/978-0-387-72711-0
http://www.springerlink.com/openurl.asp?genre=book&isbn=978-0-387-72710-3
http://site.ebrary.com/id/10252126
http://www.myilibrary.com?id=177379
http://www.netlibrary.com/urlapi.asp?action=summary&v=1&bookid=245162
http://dx.doi.org/10.1007/978-0-387-72711-0
http://www.springerlink.com/openurl.asp?genre=book&isbn=978-0-387-72710-3