N. S. Kamarudin, M. Makhtar, S. N. Wan Shamsuddin, and S. A. Fadzli, “Shape-Based Single Object Classification Using Ensemble Method Classifiers”, Int. J. Adv. Sci. Eng. Inf. Technol., vol. 7, no. 5, pp. 1907–1912, Oct. 2017.