Balmes, H. J. Mauricio Dias & Walter Riedweg, Pro Helvetaia (Foundation). Pro Helvetia.
Chicago-čujuhus (17. p.)Balmes, Hans Jürgen. Mauricio Dias & Walter Riedweg, Pro Helvetaia (Foundation). Baden, Switzerland: Pro Helvetia.
MLA-čujuhus (9. p.)Balmes, Hans Jürgen. Mauricio Dias & Walter Riedweg, Pro Helvetaia (Foundation). Pro Helvetia.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.