1. “Handbuch der speciellen pathologiche Anatomie und Histologie,”;Müller;(Henke u Lubarach),1928
2. “Ueber acces. Lungenlappen. Zeitschrift der Gesellsch. der Aerzte in Wein,”;Rektorzik;Jahrg. 1861 S.4 quoted by R. Vogel in Virch. Arch.,1899
3. “A Case of Accessory Lobe of the Right Lung,”;Simpson;Jour. Anat. and Phys.,1908
4. “On the Occurrence of Pulmonary Arteries Arising from the Thoracic Aorta,”;McCotter;Anat. Record,1910