Salaiwarkul, A., and S. Khruakong. “A Hybrid Approach for Natural Language Querying Segmentation for Tourism Ontology”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC), vol. 10, no. 1-5, Feb. 2018, pp. 109-13, https://jtec.utem.edu.my/jtec/article/view/3640.