DE GROOT, Koen. Grenzen in de vallei van Fergana. Skript Historisch Tijdschrift, Amsterdam, v. 40, n. 3, p. 229–231, 2018. DOI: 10.65245/at258s85. Disponível em: https://platform.openjournals.nl/skript/article/view/26480.. Acesso em: 19 mar. 2026.