@misc{ant+colony+optimization+algorithm+for+the+set+covering+problem,
    author = {Schiff, Krzysztof},
    title = {Ant colony optimization algorithm for the set covering problem},
    journal = {Technical Transactions},
    address = {Kraków},
    publisher = {<a href=\"http://www.wydawnictwo.pk.edu.pl/\" target=\"_blank\">Wydawnictwo PK</a>},
    date = {2013},
    number = {Y. 110, iss. 1-AC}
}