@mastersthesis{
    ukkonen04thesis,
    author = "Ukkonen, Antti",
    school = "Helsinki University of Technology",
    optmonth = "",
    title = "Data Mining Techniques for Discovering Partial Orders",
    optnote = "",
    year = "2004",
    opttype = "",
    optannote = "",
    optkey = "",
    optaddress = ""
}