@misc{the+effect+of+granulated+fly+ashes+with+phosphogypsum+on+the+hardening+of+cement+mortar,
    author = {Borowski, Gabriel i Hycnar, Jan J.},
    title = {The effect of granulated fly ashes with phosphogypsum on the hardening of cement mortar},
    journal = {Technical Transactions},
    address = {Kraków},
    publisher = {<a href=\"http://www.wydawnictwo.pk.edu.pl/\" target=\"_blank\">Wydawnictwo PK</a>},
    date = {2016},
    number = {Y. 113, iss. 2-B}
}