Ala (demon) (English Wikipedia)

Панайотова, Румяна (21 September 2006). "Тъмен се облак задава" (in Bulgarian). Българско Национално Радио. Archived from the original on 2007-09-30. Retrieved 2007-06-24.

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Ramel, Gordon John Larkman (4 March 2007). "The Nematocera". Earth-Life Web Productions. Archived from the original on 6 August 2007. Retrieved 2007-08-21. (Beside biological data, the page mentions a legend on black flies from the Carpathians.)

Radenković 1996 Radenković, Ljubinko (1996). "Митска бића српског народа: (Х)АЛА". Archived from the original on 2014-04-11. Retrieved 2007-06-21.. First appeared in the academic journal Liceum, issue no. 2 (1996, Kragujevac, Serbia), pages 11–16; the online version published by Project Rastko. (in Serbian)

Беновска-Събкова, Милена. "Хала и Ламя" (in Bulgarian). Детски танцов ансамбъл “Зорница”. Archived from the original on 2018-06-17. Retrieved 2008-03-16.
Radenković 1996 Radenković, Ljubinko (1996). "Митска бића српског народа: (Х)АЛА". Archived from the original on 2014-04-11. Retrieved 2007-06-21.. First appeared in the academic journal Liceum, issue no. 2 (1996, Kragujevac, Serbia), pages 11–16; the online version published by Project Rastko. (in Serbian)
Панайотова, Румяна (21 September 2006). "Тъмен се облак задава" (in Bulgarian). Българско Национално Радио. Archived from the original on 2007-09-30. Retrieved 2007-06-24.
Ramel, Gordon John Larkman (4 March 2007). "The Nematocera". Earth-Life Web Productions. Archived from the original on 6 August 2007. Retrieved 2007-08-21. (Beside biological data, the page mentions a legend on black flies from the Carpathians.)
Беновска-Събкова, Милена. "Змей" (in Bulgarian). Детски танцов ансамбъл “Зорница”. Archived from the original on 2018-06-17. Retrieved 2008-03-16.

Беновска-Събкова, Милена. "Хала и Ламя" (in Bulgarian). Детски танцов ансамбъл “Зорница”. Archived from the original on 2018-06-17. Retrieved 2008-03-16.
Беновска-Събкова, Милена. "Змей" (in Bulgarian). Детски танцов ансамбъл “Зорница”. Archived from the original on 2018-06-17. Retrieved 2008-03-16.