Advanced Computational Methods for Knowledge Engineering Proceedings of the 4th International Conference on Computer Science, Applied Mathematics and Applications, ICCSAMA 2016, 2-3 May, 2016, Vienna, Austria - Nguyen, Thanh Binh; van Do, Tien; An Le Thi, Hoai; Nguyen, Ngoc Thanh (Springer International Publishing : Imprint: Springer, 2016)