@misc{different+optimisation+tasks+used+in+water+quality+management,
    author = {Bielski, Andrzej},
    title = {Different optimisation tasks used in water quality management},
    journal = {Technical Transactions},
    address = {Kraków},
    publisher = {<a href=\"http://www.wydawnictwo.pk.edu.pl/\" target=\"_blank\">Wydawnictwo PK</a>},
    date = {2017},
    number = {Y. 114, vol. 7}
}