Anyikwa, I., Hamman, N. and Phiri, A. (2021) “The Persistence of Suicides in G20 Countries between 1990 and 2017: an SPSM Approach to Three Generations of Unit Root Tests”, Comparative Economic Research. Central and Eastern Europe, 24(2), pp. 153–173. doi: 10.18778/1508-2008.24.17.