Georgieva, K. Et Al. 2017. On the ratio between the sunspot number and the sunspot group number. Ninth Workshop Solar Influences on the Magnetosphere, Ionosphere and Atmosphere , (Sunny Beach, Bulgaria), 3.

Georgieva, K., KILÇIK, A., Nagovitsyn, Y., & Kirov, B., (2017). On the ratio between the sunspot number and the sunspot group number . Ninth Workshop Solar Influences on the Magnetosphere, Ionosphere and Atmosphere (pp.3). Sunny Beach, Bulgaria

Georgieva, K. Et Al. "On the ratio between the sunspot number and the sunspot group number," Ninth Workshop Solar Influences on the Magnetosphere, Ionosphere and Atmosphere, Sunny Beach, Bulgaria, 2017

Georgieva, K. Et Al. "On the ratio between the sunspot number and the sunspot group number." Ninth Workshop Solar Influences on the Magnetosphere, Ionosphere and Atmosphere , Sunny Beach, Bulgaria, pp.3, 2017

Georgieva, K. Et Al. (2017) . "On the ratio between the sunspot number and the sunspot group number." Ninth Workshop Solar Influences on the Magnetosphere, Ionosphere and Atmosphere , Sunny Beach, Bulgaria, p.3.

@conferencepaper{conferencepaper, author={K. Georgieva Et Al. }, title={On the ratio between the sunspot number and the sunspot group number}, congress name={Ninth Workshop Solar Influences on the Magnetosphere, Ionosphere and Atmosphere}, city={Sunny Beach}, country={Bulgaria}, year={2017}, pages={3} }