Publications
Reducibility vs. definability for pseudovarieties of semigroups. International Journal of Algebra and Computation. 2016;26(7):1483-1495.Edit
The algebra of implicit operations. Algebra Universalis. 1989;26:16-32.Edit
Minimal nonpermutative pseudovarieties of semigroups. I, II. Pacific J. Math.. 1986;121:257-270, 271-279.Edit
Dynamics of finite semigroups. In: Semigroups, algorithms, automata and languages (Coimbra, 2001). World Sci. Publ., River Edge, NJ; 2002. 2. p. 269-292p. Edit
Reduced factorizations in free profinite groups and join decompositions of pseudovarieties. Internat. J. Algebra Comput.. 1994;4:375-403.Edit
[2015-34] Representations of relatively free profinite semigroups, irreducibility, and order primitivity .Edit
An addendum: ``The gap between partial and full'' [Internat. J. Algebra Comput. \bf 8 (1998), no. 3, 399–430; MR1627844 (99g:20102)]. Internat. J. Algebra Comput.. 2001;11:131-135.Edit
Recent developments in the theory of implicit operations. In: Monoids and semigroups with applications (Berkeley, CA, 1989). World Sci. Publ., River Edge, NJ; 1991. 1. p. 105-117p. Edit
Gérard Lallement (1935–2006). Semigroup Forum. 2009;78:379-383.Edit
The ω-inequality problem for concatenation hierarchies of star-free languages. Forum Mathematicum. 2018;30:663-679.Edit
Some algorithmic problems for pseudovarieties. Publ. Math. Debrecen. 1999;54:531-552.Edit
The pro-nilpotent group topology on a free group. Journal of Algebra. 2017;480:332-345.Edit
Improved QT variability quantification by multilead automatic delineation. In: {32nd Annual Conference on Computers in Cardiology}. Vol {32}. {IEEE}; 2005. {. {p. 503-506p. }.Edit
Semidirectly closed pseudovarieties of locally trivial semigroups. Semigroup Forum. 1990;40:315-323.Edit
Complete reducibility of pseudovarieties. In: Semigroups and formal languages. World Sci. Publ., Hackensack, NJ; 2007. 9. p. 9-25p. Edit
Some pseudovariety joins involving the pseudovariety of finite groups. Semigroup Forum. 1988;37:53-57.Edit
The globals of some subpseudovarieties of DA. Internat. J. Algebra Comput.. 2004;14:525-549.Edit
Equidivisible pseudovarieties of semigroups. Publicationes Mathematicae. 2017;90(3-4):435-453.Edit
Relatively free profinite monoids: an introduction and examples. In: Semigroups, formal languages and groups (York, 1993). Vol 466. Kluwer Acad. Publ., Dordrecht; 1995. 7. p. 73-117p. (NATO Adv. Sci. Inst. Ser. C Math. Phys. Sci.; vol 466).Edit
Some algorithms on the star operation applied to finite languages. Semigroup Forum. 1984;28:187-197.Edit
Dynamics of implicit operations and tameness of pseudovarieties of groups. Trans. Amer. Math. Soc.. 2002;354:387-411 (electronic).Edit
A sequence of weakly monotonic automata with increasing level. Int. J. Algebra. 2013;7:91-100.Edit