B. Ciabiada, P. Paciej, M. Bryła, and I. Maniecka-Bryła, “An Assessment of Changes in Excess Mortality of Males Aged 65 and More in the Period 1999–2013 in the Lodz Region”, Folia Oeconomica, vol. 5, no. 331, pp. 39–50, Jan. 2018.