APA (7th ed.) Citation

Grau, J., & Oller-Marcén, A. (2015). Variations on Giuga Numbers and Giuga’s Congruence. Український математичний журнал.

Chicago Style (17th ed.) Citation

Grau, J.-M, and A.M Oller-Marcén. "Variations on Giuga Numbers and Giuga’s Congruence." Український математичний журнал 2015.

MLA (8th ed.) Citation

Grau, J.-M, and A.M Oller-Marcén. "Variations on Giuga Numbers and Giuga’s Congruence." Український математичний журнал, 2015.

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