Siebel, R; Baumgartner, R; Greitemann, B; Junker, Th. (6 בדצמבר 2012). "The Treatment of Malum Perforans Pedis". In Altmeyer, Peter; Hoffmann, Klaus; el Gammal, Stephan; et al. (eds.). Wound Healing and Skin Physiology. Springer Science & Business Media. p. 423. ISBN978-3-642-77882-7. {{cite book}}: (עזרה)