NaTec 1/2 squadra d'auturAs (ediziùn tudestga): Katrin Bölsterli Bardy [a 17 oters] ; manadra da project: Josy Marie Künzler ; translaziùn: Barbara Riesch
Bibliothekskatalog der Kantonsbibliothek Graubünden: https://www.opac.gr.ch/discovery/fulldisplay?context=L&vid=41BGR_INST:41BGR_V1&search_scope=MyInstitution&tab=LibraryCatalog&docid=alma990007140270206696