Tassi, F.; Aguilera, F.; Vaselli, O.; Darrah, T.; Medina, E. Gas Discharges from Four Remote Volcanoes in Northern Chile (Putana, Olca, Irruputuncu and Alitar): A Geochemical Survey. Ann. Geophys. 2011, 54 (2). https://doi.org/10.4401/ag-5173.