@Book{BMDB20170011361, title = "Los expedientes OVNI desclasificados", author = "Ballester Olmos, Vicente-Juan", publisher = "Vicente-Juan Ballester Olmos", editor = "Vicente-Juan Ballester Olmos", URL = "https://bibliotecavirtual.defensa.gob.es/BVMDefensa/es/consulta/registro.do?id=42382", year = "2001", }