References
-
Aizenshtat A.J. The defining relations of the endomorphism semigroup of a finite linered ordered set. Sib. Math. J. 1962, 3 (2), 161-169.
-
Pin J.E. Varieties of formal languages. Masson, Paris, 1984.
-
Ganyushkin O., Mazorchuk V. Classical Finite Transformation semigroups. An Introduction. In: Algebra and Applications, 9, XII. Springer-Verlag, London, 2009.
-
Stronska A. Nilpotent subsemigroups of a semigroup of order-decreasing transformations of a rooted tree. Algebra Discrete Math. 2006, (4), 126-140.
-
Stronska A.O. Semigroup of order-decreasing transformations of the boolean of a finite set. Bull. Kyiv Univ.: Series Phys.-Math. Sci. 2006, 2, 57-62.
-
Korshunov A.D. Monotone Boolean functions. Russian Math. Surveys 2003, 58 (5), 929.
doi: 10.1070/RM2003v058n05ABEH000667
(translation of Uspekhi mat. nauk 2003, 58 (5), 89-162.
doi: 10.4213/rm667 (in Russian))