@inproceedings{DLT-1993-CaludeS,
	author        = "Cristian Calude and Arto Salomaa",
	booktitle     = "{Proceedings of the First International Conference on Developments in Language Theory}",
	isbn          = "981-02-1645-9",
	pages         = "472--492",
	publisher     = "{World Scientific}",
	title         = "{Algorithmically Coding the Universe}",
	year          = 1993,
}