By Didier Lévy. Ecole des Loisirs 1999 . 62 p. 19 cm. 2211054536

http://bnfa.ch/cgi-bin/koha/opac-detail.pl?biblionumber=1724 ISBN 2092507559 http://bnfa.ch/cgi-bin/koha/opac-detail.pl?biblionumber=3729

By Didier Lévy. Nathan 2005 . 1 vol. (29 p.) 19 cm. 2092507559

http://bnfa.ch/cgi-bin/koha/opac-detail.pl?biblionumber=3729 ISBN 209250973X http://bnfa.ch/cgi-bin/koha/opac-detail.pl?biblionumber=4628

By Didier Lévy. Nathan 2006 . 1 vol. (29 p.) 19 cm. 209250973X

http://bnfa.ch/cgi-bin/koha/opac-detail.pl?biblionumber=4628 ISBN 9782092519721 http://bnfa.ch/cgi-bin/koha/opac-detail.pl?biblionumber=5203

By Didier Lévy. Nathan 2008 9782092519721

http://bnfa.ch/cgi-bin/koha/opac-detail.pl?biblionumber=5203 ISBN 9782092522356 http://bnfa.ch/cgi-bin/koha/opac-detail.pl?biblionumber=6390

By Didier Lévy. Nathan 2009 . 1 vol. (31 p.) 18 cm. 9782092522356

http://bnfa.ch/cgi-bin/koha/opac-detail.pl?biblionumber=6390