@article{article67a098b3,
title   = {Witzkeite: a new rare nitrate-sulphate mineral from a guano deposit at Punta de Lobos, Chile},
author = {Nestola, Fabrizio and Cámara, Fernando and Chukanov, Nikita V and Atencio, Daniel and Coutinho, José Moacyr Vianna and Contreira Filho, Reynaldo R and Färber, Gunnar},
year = {2012},
doi = {10.2138/am.2012.4109},
journal   = {American Mineralogist}
}