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)