1.- "Invisible" Ag and Au in supergene Cu-sulfides; EMPA, SIMS and TEM constraints Elsevier; New York, NY; III; International, 2010 Abstracts of the 20th annual V. M. Goldschmidt conference Ver registro 2.- "Invisible" silver and gold in supergene digenite (Cu (sub 1.8) S) Elsevier; New York, NY; III; International, 2010 Ver registro 3.- Cristobalite nanofibers in volcanic ash from the ongoing explosive eruption at Chaiten Volcano, Chilean Patagonia Elsevier; New York, NY; III; International, 2009 Abstracts of the 19th annual V. M. Goldschmidt conference Ver registro