Vavra, Petr, ir kt. „Transanal Endoscopic Microsurgery: An Indispensable Component of Contemporary Coloproctology“. Lietuvos Chirurgija, t. 3, nr. 1, 2005 m.sausio, p. 0-0, https://doi.org/10.15388/LietChirur.2005.1.2331.