Adjan S.I. On the emdeddability of semigroups in groups. Doklady Akad. Nauk SSSR 1960, 133:255-257. English translation: Soviet Mathematics 1 (1960), 819-821, Amer. Math. Soc.
Adjan S.I. Defining Relations and Algorithmic Problems in Groups and Semigroups. Trudy Mat. Inst. Steklova LXXXV 1966, English translation by M Greendlinger: Proc. Stekov Inst. of Math. 85 (1967), Amer. Math. Soc.
Bell J.P., Colak P. Primitivity of finitely presented monomial algebras. J. Pure Appl. Algebra 2009, 213:1299-1305.
Cedó F., Jespers E., Okniński J. Finitely presented algebras and groups defined by permutation relations. J. Pure Appl. Algebra 2010, 214:1095-1102.
Cedó F., Jespers E., Okniński J. Algebras and groups defined by permutation relations of alternating type. J. Algebra 2010, 324:1290-1313.
Cedó F., Jespers E., Okniński J. The radical of the four generated algebra of the alternating type. Contemp. Math. 2009, 499:1-26.
Okniński J. Semigroup Algebras 1991, Marcel Dekker, New York.
Passman D.S. Permutation Groups 1968, Benjamin, New York.
Stallings J.R. A graph-theoretic lemma and group-embeddings. Annals of Mathematics Studies 1987, vol. 111. Princeton University Press, Princeton, NJ. S.M. Gersten, J.R. Stallings (Eds.).