The 180-degree perforator-based propeller flap for soft tissue coverage of the distal, lower extremity: a new method to achieve reliable coverage of the distal lower extremity with a local, fasciocutaneous perforator flap - Jakubietz, R G; Jakubietz, M G; Gruenert, J G; Kloss, D F (Ann Plast Surg, 2007)