"Naranjero" (in Spanish). Armia - Museo de la Industria Armera. Archived from the original on 2011-07-23.
books.google.com
Bishop, Chris, ed. (1998). "MP 18 and MP28". The Encyclopedia of Weapons of World War II. Orbis publishing. p. 258. ISBN1586637622.
de Quesada, Alejandro (20 November 2011). The Chaco War 1932-35: South America's greatest modern conflict. Men-at-Arms 474. Osprey Publishing. p. 24. ISBN978-1-84908-901-2.
Казазян Агоп, Оръжието на българския полицай 1878-1944, ИК "Свят.Наука", София, 1998, стр. 51-54, 62/Kazazyan, Agop, The Weapons of the Bulgarian Policeman 1878-1944, Svyat-Nauka, Sofia, 1998, pp. 51-54, 62 ISBN954-8223-47-3https://books.google.bg/books?id=1JUJywEACAAJ&dq
Казазян Агоп, Оръжието на българския полицай 1878-1944, ИК "Свят.Наука", София, 1998, стр. 82-90/Kazazyan, Agop, The Weapons of the Bulgarian Policeman 1878-1944, Svyat-Nauka, Sofia, 1998, pp. 82-90 ISBN954-8223-47-3https://books.google.bg/books?id=1JUJywEACAAJ&dq