Feliu, S., Mariaca, L., Simancas, J., González, J. A., & Morcillo, M. (2003). Effect of NO2 and/or SO2 atmospheric contaminants and relative humidity on copper corrosion. Revista De Metalurgia, 39(4), 278–288. https://doi.org/10.3989/revmetalm.2003.v39.i4.339