Balkan Mountains (English Wikipedia)

Bulgaria. 1986.
Todorova, Maria N. (1997). Imagining the Balkans. New York: Oxford University Press, Inc. p. 27. ISBN 978-0-19-508751-2.
Balkan studies. Édition de lA̕cadémie bulgare des sciences. 1986.

greenbalkans.org

Južne Vesti (16 July 2019). "Mrki medved se vratio na Staru planinu" [Brown bear returned to Stara Planina] (in Serbian). N1. Archived from the original on 21 September 2019. Retrieved 19 July 2019.
Gordana Bjeletić (6 November 2018). "Protest protiv MHE, meštani Rakite vratili reku u korito" [Protest against micro hydro, denizens of Rakita returned river to its riverbed] (in Serbian). N1. Archived from the original on 16 November 2018. Retrieved 29 December 2018.
Beta (23 October 2018). "Trivan: Trenutni zakon dozvolio MHE u zaštićenim prostorima" [Current law allows for the micro hydros to be built in the protected areas] (in Serbian). N1. Archived from the original on 6 November 2018. Retrieved 23 October 2018.

Sandra Petrušić (9 October 2018). "Cena diletantizma" [The price of dilettantism] (in Serbian). NIN.

Slavica Stuparušić (12 January 2021). "Pod zaštitom 400 hektara" [400 hectares under protection]. Politika (in Serbian). p. 33.
Slavica Stuparušić (27 April 2021). "Nove granice zaštićenih predela" [New borders of protected areas]. Politika (in Serbian). p. 30.
Višnja Aranđelović (30 July 2023). "Beloglavi sup se vraća na Staru planinu" [Griffon vulture returns to Stara Planina]. Politika (in Serbian). p. 09.
Slavica Stuparušić (21 August 2018). "Meštani i ekolozi nastavljaju da se bore za Visočicu na Staroj planini" [Denizens ad ecologists continue to fight for the Visočica and Stara Planina]. Politika (in Serbian). p. 08.
Toma Todorović (15 November 2018). "Bitka za vodu u selu Rakita" [Battle for water in Rakita village]. Politika (in Serbian). p. 09.
Toma Todorović (28 December 2018). "Sukob meštana Rakite i obezbeđenja gradilišta mini-hidroelektrane" [Clashes between the inhabitants of Rakita and securitz guards from the micro hzdro construction site]. Politika (in Serbian). p. 12.
Maja Vukadinović (25 July 2023). "Kako je Bolivud otkrio Staru planinu" [How Bollzwood discovered Stara Planina]. Politika (in Serbian). pp. 01 & 13.

Jelena Đokić (2015). "Vodopadi Srbije: Skriveni dragulji Stare planine". Portal Mladi (in Serbian).

"Проход Вратцата". Official Site of Vrachanski Balkan Nature Park. Retrieved 14 October 2021.

"Balkhan Mountains". World Land Features Database. Land.WorldCityDB.com. Archived from the original on 28 February 2008. Retrieved 31 March 2008.
"SummitPost - Stara Planina (Balkana) -- Climbing, Hiking & Mountaineering". www.summitpost.org. Archived from the original on 6 October 2008. Retrieved 2008-10-14.
"vodopadisrbije.com Kopren (Stara planina)". Archived from the original on 2017-12-28. Retrieved 2017-06-16.
Park prirode Stara Planina (PDF). Institute for nature conservation of Serbia. 2016. Archived from the original (PDF) on 2016-12-28. Retrieved 2017-06-19.
Južne Vesti (16 July 2019). "Mrki medved se vratio na Staru planinu" [Brown bear returned to Stara Planina] (in Serbian). N1. Archived from the original on 21 September 2019. Retrieved 19 July 2019.
Gordana Bjeletić (6 November 2018). "Protest protiv MHE, meštani Rakite vratili reku u korito" [Protest against micro hydro, denizens of Rakita returned river to its riverbed] (in Serbian). N1. Archived from the original on 16 November 2018. Retrieved 29 December 2018.
Beta (23 October 2018). "Trivan: Trenutni zakon dozvolio MHE u zaštićenim prostorima" [Current law allows for the micro hydros to be built in the protected areas] (in Serbian). N1. Archived from the original on 6 November 2018. Retrieved 23 October 2018.

Tzankov, Nikolay; Stoyanov, Andrei (2008). "Triturus cristatus (Laurenti, 1768): a new species for Bulgaria from its southernmost localities". Salamandra. ISSN 0036-3375.

"Balkhan Mountains". World Land Features Database. Land.WorldCityDB.com. Archived from the original on 28 February 2008. Retrieved 31 March 2008.

Park prirode Stara Planina (PDF). Institute for nature conservation of Serbia. 2016. Archived from the original (PDF) on 2016-12-28. Retrieved 2017-06-19.