Ogunniyi, J. A. and Sivakumar, V. (2017) “Ozone climatology and its variability from ground based and satellite observations over Irene, South Africa (25.5º S; 28.1º E) – Part 2: Total column ozone variations”, Atmósfera, 31(1), pp. 11–24. doi: 10.20937/ATM.2018.31.01.02.