@article{a92b009e9c3d4d9fa4d59ef272397cca,
title = "The continuous prisoner's dilemma and the evolution of cooperation through reciprocal altruism with variable investment",
keywords = "Adaptive dynamics, Evolution of cooperation, Prisoner's dilemma, Reciprocal altruism, Variable investment",
author = "Timothy Killingback and Michael Doebeli",
year = "2002",
month = oct,
day = "1",
doi = "10.1086/342070",
language = "English",
volume = "160",
pages = "421--438",
journal = "American Naturalist",
issn = "0003-0147",
publisher = "University of Chicago",
number = "4",
}