Ng SF, Ch’ng PE, Chew YM, Ng KS. Applying the Method of Lagrange Multipliers to Derive an Estimator for Unsampled Soil Properties. SRJ [Internet]. 2014 Jun. 30 [cited 2024 Nov. 5];11(1):15-28. Available from: https://journal.uitm.edu.my/ojs/index.php/SRJ/article/view/3122