@article{
    hajn:95,
    author = "Hajnicz, Elżbieta",
    title = "Some Considerations on Non-linear Time Intervals",
    url = "http://link.springer.com/article/10.1007%2FBF01049474",
    journal = "Journal of Logic, Language and Information",
    number = "4",
    volume = "4",
    year = "1995",
    bibsource = "DBLP, http://dblp.uni-trier.de",
    pages = "335--357"
}