@article{faac2018413,
author={Chen, Shi-Hao},
title={A Possible Answer for the Cosmological Constant Problem},
journal={Frontiers of Astronomy Astrophysics and Cosmology},
volume={4},
number={1},
pages={30--31},
year={2018},
url={http://pubs.sciepub.com/faac/4/1/3},
abstract={Based on a model of the universe without singularity, it is proven that the energy density of the vacuum state must be zero or a finite and small positive number. Consequently, the effective cosmological constant is easily determined according to the observations.},
doi={10.12691/faac-4-1-3}
publisher={Science and Education Publishing}
}