APA (7th ed.) Citation

Billhardt, B., Giraldes, E., Smith, M. P. M., & Martins, P. M. (2011). Some orthodox monoids with associate inverse subsemigroups.

Chicago Style (17th ed.) Citation

Billhardt, Bernd, Emília Giraldes, M. Paula Marques Smith, and Paula Mendes Martins. Some Orthodox Monoids with Associate Inverse Subsemigroups. 2011.

MLA (8th ed.) Citation

Billhardt, Bernd, et al. Some Orthodox Monoids with Associate Inverse Subsemigroups. 2011.

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