APA (7th ed.) Citation

Protasov, I. V., & Slobodianiuk, S. V. (2015). Ultrafilters on balleans.

Chicago Style (17th ed.) Citation

Protasov, I. V., and S. V. Slobodianiuk. Ultrafilters on Balleans. 2015.

MLA (8th ed.) Citation

Protasov, I. V., and S. V. Slobodianiuk. Ultrafilters on Balleans. 2015.

Warning: These citations may not always be 100% accurate.