Ekhjargal, Odbaatar, Bayanjargal Bumtsend, and Renchinmyadag Tovuudorj. 2022. “Landform Classification Based on Topographic Position Index: (A Case Study in Ulaanbaatar City)”. Mongolian Journal of Geography and Geoecology 59 (43):218-26. https://doi.org/10.5564/mjgg.v59i43.2530.