{"id":"001274333","type":"book","title":"Středověká opevnění kolem hradu Zvíkova. Mittelalterliche Befestigungen um die Burg Zvíkov","pages":"155-159","container-title":"Castellologica Bohemica, 2 (1991","author":[{"family":"Fröhlich","given":"Jiří"}],"issued":{"raw":"1991"}}