A. Fedele, M. Pedone, R. Moretti, R. Somma, C. Troise, and G. De Natale, “Continuous gas sampling and analysis at the Pisciarelli fumarolic field (Campi Flegrei) by using a quadrupole mass spectrometer (QMS)”, Rapp. Tec. INGV, vol. 344, Jan. 2016, doi: 10.13127/rpt/344.