Greville Pounds, Norman John: The Culture of the English People: Iron Age to the Industrial Revolution. Cambridge University Press. 27. Mai 1994, S. 335 (eingeschränkte Vorschau in der Google-Buchsuche): “In southeastern Europe, where the extended family was exemplified as nowhere else in the western world, the home itself was often protected, giving rise to the kula or tower-house”.
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Jeta Limani: Kulla of Mazrekaj family in Dranoc. (PDF; 1,4 MB) A Management Plan For A Sustainable Cultural Tourism
Development. S. 24, abgerufen am 11. März 2017 (englisch).
