@article{CIAA-J-2013-JirasekJ15,
	author        = "Jozef Jirásek and Galina Jirásková",
	doi           = "10.1016/j.tcs.2015.01.022",
	journal       = "{Theor. Comput. Sci}",
	pages         = "42--57",
	publisher     = "{Elsevier}",
	title         = "{On the boundary of regular languages}",
	volume        = 578,
	year          = 2015,
}