@article{ijp2013153,
author={{Likui, Zhan and Yining, Sun},
title={Discussion on Mass in a Gravitational Field},
journal={International Journal of Physics},
volume={1},
number={5},
pages={110--114},
year={2013},
url={http://pubs.sciepub.com/ijp/1/5/3},
abstract={In a black hole, no force can prevent matter from collapsing into a point, a gravitational singularity. The problem of the singularity is always a difficult one. We attempt to discuss gravitation from another angle in this work. Based on experimental analysis and theoretical verification, a hypothesis regarding mass in gravitational fields is presented. It can avoid the problem of singularity, and the meaning of gravitation is simple to determine.},
doi={10.12691/ijp-1-5-3}
publisher={Science and Education Publishing}
}