Havas, G., & Vaughan-Lee, M. (2005). 4-Engel groups are locally nilpotent.
Cita Chicago (17th ed.)Havas, G., i M. Vaughan-Lee. 4-Engel Groups Are Locally Nilpotent. 2005.
Cita MLA (9th ed.)Havas, G., i M. Vaughan-Lee. 4-Engel Groups Are Locally Nilpotent. 2005.
Atenció: Aquestes cites poden no estar 100% correctes.