@article{Lahdenperä2004,
author = {Lahdenperä, M. and Lummaa, V. and Helle, S. and Tremblay, M. and Russell, A.F.},
title= {Fitness benefits of prolonged post-reproductive lifespan in women},
year = {2004},
doi = {10.1038/nature02367},
journal = {Nature },
volume = {428},
pages = {178--181},
}