1. ASTM D2487-17 (2017) Standard practice for classification of soils for engineering purposes (unified soil classification system). ASTM International, West Conshohocken
2. ASTM D4253-16 (2016) Standard test methods for maximum index density and unit weight of soils using a vibratory table. ASTM International, West Conshohocken
3. ASTM D4254-16 (2016) Standard test methods for minimum index density and unit weight of soils and calculation of relative density. ASTM International, West Conshohocken
4. ASTM D854-14 (2014) Standard test methods for specific gravity of soil solids by water pycnometer. ASTM International, West Conshohocken
5. Brandes HG (2011) Simple shear behavior of calcareous and quartz sands. Geotech Geol Eng 29(1):113–1126. https://doi.org/10.1007/s10706-010-9357-x