Neagu, G. “Minimum Level of Education. An Analysis of the Results of Romanian Students Based on Pisa Data”. Anuarul Universitatii Petre Andrei Din Iasi - Fascicula: Asistenta Sociala, Sociologie, Psihologie, vol. 21, July 2019, pp. 58-87, doi:10.18662/upasw/15.