Alam, A. K. M. Masud; Xie, Shucheng; Saha, Dilip Kumar; Chowdhury, Sifatul Quader. Clay mineralogy of archaeological soil: an approach to paleoclimatic and environmental reconstruction of the archaeological sites of the Paharpur area, Badalgacchi upazila, Naogaon district, Bangladesh. Environmental Geology (Springer). 2007, 53 (8): 1639–1650. S2CID 129426067. doi:10.1007/s00254-007-0771-1.
Alam, A. K. M. Masud; Xie, Shucheng; Saha, Dilip Kumar; Chowdhury, Sifatul Quader. Clay mineralogy of archaeological soil: an approach to paleoclimatic and environmental reconstruction of the archaeological sites of the Paharpur area, Badalgacchi upazila, Naogaon district, Bangladesh. Environmental Geology (Springer). 2007, 53 (8): 1639–1650. S2CID 129426067. doi:10.1007/s00254-007-0771-1.