@article{Metz1992,
author = {Metz, J.A.J. and Nisbet, R.M. and Geritz, S.A.H.},
title= {How should we Define `Fitness' for General Ecological Scenarios?},
year = {1992},
doi = {10.1016/0169-5347(92)90073-K},
journal = {Trends in Ecology and Evolution},
volume = {7},
number = {6},
pages = {198--202},
}