APA (7th ed.) Citation

Grau, J. M., & Грау, Х. М. (2015). Variations on Giuga Numbers and Giuga’s Congruence. Institute of Mathematics, NAS of Ukraine.

Chicago Style (17th ed.) Citation

Grau, José María, and Хосе Марія Грау. Variations on Giuga Numbers and Giuga’s Congruence. Institute of Mathematics, NAS of Ukraine, 2015.

MLA (8th ed.) Citation

Grau, José María, and Хосе Марія Грау. Variations on Giuga Numbers and Giuga’s Congruence. Institute of Mathematics, NAS of Ukraine, 2015.

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