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SINGH, T.; PATNAIK, A.; SATAPATHY, B.; TOMAR, B. Development and Optimization of Hybrid Friction Materials Consisting of Nanoclay and Carbon Nanotubes by Using Analytical Hierarchy Process (AHP) and Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) under Fuzzy Atmosphere. Walailak J Sci & Tech 2013, 10, 343-362.