@ARTICLE{
author={Cirkovic Milan M,Sandberg Anders,Bostrom Nick},
year={2010},
title={Anthropic Shadow: Observation Selection Effects and Human Extinction Risks},
journal={RISK ANALYSIS},
volume={30},
number={10},
pages={1495-1506},
document_type={Article},
} 

@ARTICLE{
author={Cirkovic Milan M,Bostrom Nick},
year={2000},
title={Cosmological constant and the final anthropic hypothesis},
journal={ASTROPHYSICS AND SPACE SCIENCE},
volume={274},
number={4},
pages={675-687},
document_type={Article},
}