GEORGIEVA, K. Et Al. 2017. The Ratio Between the Number of Sunspot and the Number of Sunspot Groups. GEOMAGNETISM AND AERONOMY , vol.57, no.7 , 776-782.

GEORGIEVA, K., KILÇIK, A., Nagovitsyn, Y., & KIROV, B., (2017). The Ratio Between the Number of Sunspot and the Number of Sunspot Groups. GEOMAGNETISM AND AERONOMY , vol.57, no.7, 776-782.

GEORGIEVA, K. Et Al. "The Ratio Between the Number of Sunspot and the Number of Sunspot Groups," GEOMAGNETISM AND AERONOMY , vol.57, no.7, 776-782, 2017

GEORGIEVA, K. Et Al. "The Ratio Between the Number of Sunspot and the Number of Sunspot Groups." GEOMAGNETISM AND AERONOMY , vol.57, no.7, pp.776-782, 2017

GEORGIEVA, K. Et Al. (2017) . "The Ratio Between the Number of Sunspot and the Number of Sunspot Groups." GEOMAGNETISM AND AERONOMY , vol.57, no.7, pp.776-782.

@article{article, author={K. GEORGIEVA Et Al. }, title={The Ratio Between the Number of Sunspot and the Number of Sunspot Groups}, journal={GEOMAGNETISM AND AERONOMY}, year=2017, pages={776-782} }