Havas, G., & Vaughan-Lee, M. (2005). 4-Engel groups are locally nilpotent.
Lua i Stíl Chicago (17ú heag.)Havas, G., agus M. Vaughan-Lee. 4-Engel Groups Are Locally Nilpotent. 2005.
Lua MLA (9ú heag.)Havas, G., agus M. Vaughan-Lee. 4-Engel Groups Are Locally Nilpotent. 2005.
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