@misc{natural+physical+cavity+and+quantification+of+its+parameters+by+in+situ+experiment+method,
    author = {Bielek, Milan i Bielek, Boris i Szabó, Daniel},
    title = {Natural physical cavity and quantification of its parameters by in situ experiment method},
    journal = {Czasopismo Techniczne. Budownictwo},
    address = {Kraków},
    publisher = {<a href=\"http://www.wydawnictwo.pk.edu.pl/\" target=\"_blank\">Wydawnictwo PK</a>},
    date = {2009},
    number = {R. 106, Z. 5, 1-B}
}