1. UNE 103103:1994 — Determinación Del Límite Líquido de Un Suelo Por El Método Del Aparato de Casagrande;AENOR,1994
2. ASTM D4318–17e1 — Standard Test Methods for Liquid Limit, Plastic Limit and Plasticity Index of Soils;ASTM,2017
3. Use of cone penetrometer to determine consistency limits;Belviso;Ground Eng.,1985
4. BS EN ISO 17892–12:2018 — Geotechnical Investigation and Testing — Laboratory Testing of Soil — Part 12: Determination of Liquid and Plastic Limits;BSI,2018
5. The effect of clay content on liquid limit from fall cone and the British cup device;Budhu;Geotech. Test. J.,1985