@article{Goodman1971,
author = {Goodman, L.A.},
title= {On the sensitivity of the intrinsic growth rate to changes in the age-specific birth and death rates},
year = {1971},
doi = {10.1016/0040-5809(71)90025-6},
journal = {Theoretical Population Biology},
volume = {2},
number = {3},
pages = {339--354},
}