Algin, Oktay; Gokalp, Gokhan; Topal, Ugur (2009). "Signs in chest imaging: a pictorial review". Diagnostic and Interventional Radiology. doi:10.4261/1305-3825.DIR.2901-09.1. ISSN1305-3825.
Algin, Oktay; Gokalp, Gokhan; Topal, Ugur (2009). "Signs in chest imaging: a pictorial review". Diagnostic and Interventional Radiology. doi:10.4261/1305-3825.DIR.2901-09.1. ISSN1305-3825.