↑ Tatomir, A. và đồng nghiệp (2018). “Conceptual model development using a generic Features, Events, and Processes (FEP) database for assessing the potential impact of hydraulic fracturing on groundwater aquifers”. Advances in Geosciences 45: 185–192. doi:10.5194/adgeo-45-185-2018.
↑ Gregory, Frank Hutson (January 1992) Cause, Effect, Efficiency & Soft Systems Models Warwick Business School Research Paper No. 42. With revisions and additions it was published in the Journal of the Operational Research Society (1993) 44(4), pp. 149–68.
↑ Mylopoulos, J.. “Conceptual modeling and Telos1”. Trong Loucopoulos, P.; Zicari, R. Conceptual Modeling, Databases, and Case An integrated view of information systems development. New York: Wiley. tr. 49–68. Đã bỏ qua tham số không rõ |citeseerx= (trợ giúp)
