A. Diabaté, J. L. Zerbo and F. Ouattara, Variation of the foF2 parameter during fluctuating activity: Prediction with IRI-2012 compared to measured data from Ouagadougou inosonde station during solar cycles 21 and 22, Vietnam J. Earth Sci. 41 (2019) 59–68. DOI: https://doi.org/10.15625/0866-7187/41/1/13549.