S. . Rasidi and Zulkanain Abdul Rahman, “Permasalahan Sempadan dan Tuntutan Wilayah: Kajian Latar Belakang Hubungan dan Sejarah Awal Hulu Perak-Reman Sebelum 1882: Border Issues and Territorial Claims: A Study on the Background of Early History and Relationships Between Hulu Perak and Reman Prior to 1882”, SEJARAH, vol. 32, no. 2 (December), Dec. 2023.