Cite

    Hongmei Bai et al.. “Nonlinear dependence study of ionospheric F2 layer critical frequency with respect to the solar activity indices using the mutual information method.” Advances in space research, vol. 64, no. 5, 2019, pp. 1085–1092. http://access.bl.uk/ark:/81055/vdc_100088832694.0x000038