REFERENCES
- Burns , R. G. , Medvedev , Y. ( 2003 ). Group laws implying virtual nilpotentence . J. Aust. Math. Soc. 74 : 295 – 312 . [CSA]
- Black , S. ( 1999 ). Which words spell “almost nilpotent?” J. Algebra 221 : 475 – 496 . [CSA] [CROSSREF]
- Burns , R. , Macédonska , O. , Medvedev , Y. ( 1997 ). Groups satisfying semigroup laws, and nilpotent by Burnside varieties . J. Algebra 195 : 510 – 525 . [CSA] [CROSSREF]
- Burns , R. G. (Translator) , Kargapolov , M. l. , Merzljakov , Ju. l. ( 1979 ). Fundamentals of the Theory of Groups . Vol. 62 . New York/Heidelberg/Berlin : Springer-Verlag .
- Li , Q. ( 2004 ). Which words have an efficient result? Comm. Algebra 32 : 2527 – 2545 . [CSA] [CROSSREF]
- Lyndon , R. C. , Schupp , P. E. ( 1977 ). Combinatorial Group Theory . Vol. 89 . Berlin/ Heidelberg/New York : Springer-Verlag .
- Mal’cev , A. I. ( 1953 ). Nilpotent semigroups . Uchen. Zap. Ivanovsk. Ped. Inst. 4 : 107 – 111 . [CSA]
- Neumann , B. H. , Tayor , T. ( 1963 ). Subsemigroups of nilpotent groups . Proc. Roy. Soc. London Ser. A 274 : 1 – 4 . [CSA]
- Robinson , D. J. S. ( 1982 ). A Course in the Theory of Groups . Vol. 80 . New York/Heidelberg/ Berlin : Springer-Verlag .
- Semple , J. F. , Shalev , A. ( 1993 ). Combinatorical conditions in residually finite groups I . J. Algebra 157 : 43 – 50 . [CSA] [CROSSREF]
- Shalev , A. ( 1993 ). Combinatorical conditions in residually finite groups II . J. Algebra 157 : 51 – 62 . [CSA] [CROSSREF]
- #Communicated by D. Macpherson.