@misc{material+and+construction+solutions+of+war+shelters+with+the+example+of+hitler+039+s+main+headquarters+in+the+wolf+s+lair,
    author = {Szydlowski, Rafal i Bednarz, Katarzyna},
    title = {Material and construction solutions of war shelters with the example of Hitler's main headquarters in the Wolf’s Lair},
    journal = {Technical Transactions},
    address = {Kraków},
    publisher = {<a href=\"http://www.wydawnictwo.pk.edu.pl/\" target=\"_blank\">Wydawnictwo PK</a>},
    date = {2018},
    number = {Vol. 115, iss. 1}
}