Suprobo, Priyo, and Tavio Tavio. “A REGIONAL REFINEMENT FOR FINITE ELEMENT MESH DESIGN USING COLLAPSIBLE ELEMENT ”. Civil Engineering Dimension 2, no. 2 (June 2, 2004): pp. 83-91. Accessed April 24, 2024. https://ced.petra.ac.id/index.php/civ/article/view/15525.