@misc{power+industry+coal+ecology,
    author = {Machowska, Halina},
    title = {Power industry – coal ecology},
    journal = {Technical Transactions},
    address = {Kraków},
    publisher = {<a href=\"http://www.wydawnictwo.pk.edu.pl/\" target=\"_blank\">Wydawnictwo PK</a>},
    date = {2015},
    number = {Y. 112, iss. 1-Ch}
}