D.A.F. Batchelor. “Discussion: Late Pleistocene Sedimentation and Landform Development in Western Kalimantan (Indonesian Borneo) by M.B. Thorp Et al.: Geologie En Mijnbouw 69: 133-150, 1990”. Netherlands Journal of Geosciences, vol. 71, Jan. 1992, pp. 281-6, https://njgjournal.nl/index.php/njg/article/view/12547.