1. Apostolov, E.M., Quasi-biennial oscillation in sunspot activity, Bull. Astron. Inst. Czech., 1985, vol. 36, no. 2, pp. 97–102.
2. Atıcı, R. and Sağır, S, The effect of QBO on foE, Adv. Space Res., 2017, vol. 60, no. 2, pp. 357–362. doi 10.1016/ j.asr.2016.10.012
3. Atıcı, R. and Sağır, S., The effect on sporadic-E of quasi-biennial oscillation, J. Phys. Sci. Appl., 2016, vol. 6, no. 2, pp. 10–17.
4. Atıcı, R., Güzel, E., Canyılmaz, M., and Sağır, S., The effect of lightning-induced electromagnetic waves on the electron temperatures in the lower ionosphere, Kuwait J. Sci., 2016, vol. 43, no. 4, pp. 143–149.
5. Bhawre, P., Kishore, K., Dogra, S.K., Purohit, P.K., Waheed, M.A., Khatarkar, P., and Atulkar, R., Characteristic of ionospheric foF2 and solar indices during the 23rd solar cycle over high latitude station, Syowa, Antarctica, Am. J. Clim. Change, 2015, vol. 4, no. 5, pp. 408–416.