http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
proceedings of the international conference SPT 2002, Cala Gonone, Sardinia, Italy, 19-26 May 2002
International Workshop on Symmetry and Perturbation Theory (2002 : Cala Gonone, Italy)
edited by Simonetta Abenda, Giuseppe Gaeta, Sebastian Walcher.