Potyra, Maciej. “Life Expectancy and Lifespan Inequality: A Perfect Linear Correlation? Analysis of the Relationship With a Particular Emphasis on the Case of Countries Going through the Life Expectancy Stagnation Period”. Studia Demograficzne, no. 1(175), Dec. 2019, pp. 63-80, doi:10.33119/SD.2019.1.3.