Key points are not available for this paper at this time.
Fred L. Hulting, David B. Orr, John J. Obrycki, A Computer Program for Calculation and Statistical Comparison of Intrinsic Rates of Increase and Associated Life Table Parameters, The Florida Entomologist, Vol. 73, No. 4 (Dec., 1990), pp. 601-612
Hulting et al. (Sat,) studied this question.