@proceedings{
    trs:11,
    editor = "Peters, James F. and Skowron, Andrzej and Chan, Chien-Chung and Grzymała-Busse, Jerzy W. and Ziarko, Wojciech",
    publisher = "Springer-Verlag",
    isbn = "978-3-642-18301-0",
    title = "Transactions on Rough Sets XIII",
    series = "Lecture Notes in Computer Science",
    booktitle = "T. Rough Sets",
    number = "6499",
    year = "2011"
}