1. Vietnamese land law (2013). https://thuvienphapluat.vn/van-ban/Bat-dong-san/Luat-dat-dai-2013-215836.aspx (In Vietnamese)
2. Boella, G., Di Caro, L., Leone, V.: Semi-automatic knowledge population in a legal document management system. Artif. Intell. Law 27, 227–251 (2019)
3. Brownlee, J.: XGBoost with Python: Gradient Boosted Trees with XGBoost and scikit-learn. Machine Learning Mastery (2016)
4. Diep, N.N.: Vietnamese Law Dictionary. The Gioi Publisher. https://www.sachluat.com.vn/sach-luat-d0n/tu-dien-phap-luat-viet-nam-luat-gia-nguyen-ngoc-diep/ (In Vietnamese)
5. Palmirani, M., Bincoletto, G., Leone, V., Sapienza, S., Sovrano, F.: PrOnto ontology refinement through open knowledge extraction. In: Legal Knowledge and Information Systems, pp. 205–210. IOS Press (2019)