@inproceedings{1043085,
    title = "Path coloring problems in graphs are non-approximable",
    author = "Νομικός, Χρήστος",
    year = "2000",
    pages = "223-230",
    publisher = "World Scientific",
    booktitle = "Advances in informatics. 7th Hellenic Conference on Informatics (HCI '99)"
}