@inproceedings{AFL-2008-LehtinenO,
	author        = "Tommi Lehtinen and Alexander Okhotin",
	booktitle     = "{Proceedings of the 12th International Conference on Automata and Formal Languages}",
	isbn          = "978-963-311-367-7",
	pages         = "269--280",
	title         = "{Boolean grammars and gsm mappings}",
	year          = 2008,
}