Haji Mirza Hossein Khoshnevis, P., Agrell, P. J., Hatami-Marbini, A., & et al. (2013). Measuring and Modelling Productivity in Education: State-of-the-Art and Research Frontiers. 11th International Conference on Data Envelopment Analysis DEA2013, Samsum (Turkey). https://hdl.handle.net/2078.5/188196