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3. 3) Robertson, Peter K., Lucas de Mello, David J. Williams, and G. Ward Wilson, (2019): Report of the Expert Panel on the Technical Causes of the Failure of Feijão Dam I.
4. 4) Pyke, Robert, (2017): (24) The Ordinary Method of Columns as an Alternative to Limit Equilibrium Analyses of Slope Stability | LinkedIn
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