@article{ hajn:99, author = "Hajnicz, Elżbieta", title = "Some Considerations on Branching Areas of Time", url = "http://link.springer.com/article/10.1023%2FA%3A1008229020082", journal = "Journal of Logic, Language and Information", number = "1", volume = "8", year = "1999", bibsource = "DBLP, http://dblp.uni-trier.de", pages = "17--43" }