Stolnitz, George J. (1955). "A Century of International Mortality Trends_ I". Population Studies. 9 (1): 24–55. doi:10.2307/2172340. JSTOR2172340.
Mirrlees, J. A. (1967). "Optimum Growth When Technology is Changing". The Review of Economic Studies. 34 (1): 95–124. doi:10.2307/2296573. JSTOR2296573.
Stolnitz, George J. (1955). "A Century of International Mortality Trends_ I". Population Studies. 9 (1): 24–55. doi:10.2307/2172340. JSTOR2172340.
Mirrlees, J. A. (1967). "Optimum Growth When Technology is Changing". The Review of Economic Studies. 34 (1): 95–124. doi:10.2307/2296573. JSTOR2296573.