Golden 2013, p. 54-55. Golden, Peter Benjamin (2013). "Some Notes on the Etymology of Sabirs". In Alexander A. Sinitsyn; Maxim M. Kholod (eds.). Κοινον Δωρον - Studies and Essays in Honour of Valery P. Nikonorov on the Occasion of His Sixtieth Birthday presented by His Friends and Colleagues. St. Petersburg State University - Faculty of Philology. pp. 49–55.
Golden 2013, p. 51, note 18. Golden, Peter Benjamin (2013). "Some Notes on the Etymology of Sabirs". In Alexander A. Sinitsyn; Maxim M. Kholod (eds.). Κοινον Δωρον - Studies and Essays in Honour of Valery P. Nikonorov on the Occasion of His Sixtieth Birthday presented by His Friends and Colleagues. St. Petersburg State University - Faculty of Philology. pp. 49–55.