@article{Kim1989,
author = {Kim, Y.J. and Aron, J.L.},
title= {On the equality of average age and average expectation of remaining life in a stationary population},
year = {1989},
doi = {10.1137/1031005},
journal = {SIAM Review},
volume = {31},
number = {1},
pages = {110−113},
}