@misc{experimental+tests+on+strengthened+and+unstrengthened+masonry+vault+with+backfill,
    author = {Hojdys, Łukasz i Krajewski, Piotr},
    title = {Experimental tests on strengthened and unstrengthened masonry vault with backfill},
    address = {Warszawa},
    publisher = {Stowarzyszenie Konserwatorów Zabytków},
    date = {2012}
}