@misc{heat+pumps+as+a+renewable+energy+source+for+administrative+buildings,
    author = {Vranay, Frantisek i Vranayová, Zuzana i Očipová, Daniela},
    title = {Heat pumps as a renewable energy source for administrative buildings},
    journal = {Czasopismo Techniczne. Budownictwo},
    address = {Kraków},
    publisher = {<a href=\"http://www.wydawnictwo.pk.edu.pl/\" target=\"_blank\">Wydawnictwo PK</a>},
    date = {2012},
    number = {R. 109, Z. 3, 2-B}
}