@misc{perspective+as+a+convention+of+spatial+objects+representation,
    author = {Kulig, Anna i Romaniak, Krystyna},
    title = {Perspective as a convention of spatial objects representation},
    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. 11-A}
}