@misc{modern+safety+systems+for+work+at+height,
    author = {Drozd, Wojciech i Kowalik, Marcin},
    title = {Modern safety systems for work at height},
    journal = {Technical Transactions},
    address = {Kraków},
    publisher = {<a href=\"http://www.wydawnictwo.pk.edu.pl/\" target=\"_blank\">Wydawnictwo PK</a>},
    date = {2014},
    number = {Y. 111, iss. 1-B}
}