↑ Species and breeds of poultry Centar za očuvanje autohtonih rasa = Center for preservation of indigenous breeds. Accessed May 2019. Archived 25 April 2019[Date mismatch] at the Wayback Machine. ↑ Waltraud Kugler (2009). Rare Breeds and Varieties of the Balkan - Atlas 2009 Archived 2012-03-16 at the Wayback Machine. St. Gallen: Monitoring Institute for Rare Breeds and Seeds in Europe. p. 46. ↑ http://bulgarianbreeds.dir.bg/_wm/gallery/item.php?did=2747146&df=561161&dflid=3 CITATION Close "Stara Zagora/Starozagorska red chicken". Hristo Lukanov. Retrieved 2010-12-18 Archived 2018-06-19 at the Wayback Machine. ↑ Dirk de Jong (2007). De Bresse-Gauloise: Ruim 400 jaar oud en nog springlevend = Bresse-Gauloise: More than 400 years old, and still fresh and lively. Aviculture-Europe 3 (2): [unpaginated, 9 pages]. ↑ CITATION Close[5] Chickens. Poultry Club of Great Britain. Archived 9 November 2018. ↑ Close[2] Chris Graham (2006). Choosing and Keeping Chickens. London: Hamlyn. ISBN 9780600614388. ↑ [Keeping Chickens Guide Archived 2010-02-03 at the Wayback Machine.