D. A. Firmansyah และผู้แต่งคนอื่นๆ. (2024) Mechanical Properties of Soft Clay Soil Improved with Nanomaterials and Chitosan Biopolymer. <i>The Geotechnical Engineering Journal of the SEAGS & AGSSEA</i>, <i>55</i>(2), 31-37.D. A. Firmansyah และผู้แต่งคนอื่นๆ. "Mechanical Properties of Soft Clay Soil Improved with Nanomaterials and Chitosan Biopolymer". The Geotechnical Engineering Journal of the SEAGS & AGSSEA 55 (2024):31-37.D. A. Firmansyah และผู้แต่งคนอื่นๆ. Mechanical Properties of Soft Clay Soil Improved with Nanomaterials and Chitosan Biopolymer. Southeast Asian Geotechnical Society:ม.ป.ท. 2024.