Mediomatix 3. classa, lingua vallader direcziun dal proget: Scola auta da pedagogia dal Grischun (SAPGR) ; mainaproget e redacziun: Rico Cathomas, Annalisa Cathomas, Manfred Gross, Irina Lutz
Bibliothekskatalog der Kantonsbibliothek Graubünden: https://www.opac.gr.ch/discovery/fulldisplay?context=L&vid=41BGR_INST:41BGR_V1&search_scope=MyInstitution&tab=LibraryCatalog&docid=alma990007014880206696