@misc{determine+the+optimal+system+structure+of+the+combined+production+of+electricity+and+heat,
    author = {Gavlik, Martin i Böszörményi, Ladislav},
    title = {Determine the optimal system structure of the combined production of electricity and heat},
    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. 3-B}
}