Levy, D.T., Levy, J., Mauer-Stender, K. 2019
The World Bank 2018
Ross, H. 2017
Gallus, S., Schiaffino, A., La Vecchia, C. et al. 2006
Gilmore, A.B., McKee, M. 2004
Gilmore, A.B., McKee, M. 2003