@inproceedings{ben1989periods,
title={Periods and the asymptotics of a diophantine problem: I},
author={Ben Lichtin},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203537010150573},
booktitle={Arkiv for Matematik},
volume={30},
number={1},
pages={105-131},
year={1989},
}