1. Ganascia, J.-G.: Agape et Charade : deux mécanismes d’apprentissage symbolique appliqués à la construction de bases de connaissances. Thèse d'État, Université Paris-sud, France (1987)
2. Hadj-Mabrouk, H.: CLASCA: learning system for classification and capitalization of accident scenarios of railway. J. Eng. Res. Appl. 6(8), 91–98 (2016a)
3. Li, J., Wang, J., Xu, N., Hu, Y., Cui, C.: Importance degree research of safety risk management processes of urban rail transit based on text mining method. J. Inf. 9(2), 26 (2018)
4. Hayward, V.: Big Data and the Digital Railway (2018). Available from: https://on-trac.co.uk/big-data-digital-railway/
5. Williams, T., Betakbc, J.: A comparison of LSA and LDA for the analysis of railroad accident text. Procedia Comput. Sci. 130, 98–102 (2018)