@article {MR1945169,
	title = {A new class of divisors of semigroups of isotone mappings of finite chains},
	journal = {Izv. Vyssh. Uchebn. Zaved. Mat.},
	number = {3},
	year = {2002},
	pages = {51{\textendash}59},
	issn = {0021-3446},
	author = {Fernandesh, V. U.}
}
