@inproceedings{lawrence1971the,
title={The regularity of growth of entire functions whose zeros are hyperplanes},
author={Lawrence Gruman},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203448368358162},
booktitle={Arkiv for Matematik},
volume={10},
number={1},
pages={23-31},
year={1971},
}
Lawrence Gruman. The regularity of growth of entire functions whose zeros are hyperplanes. 1971. Vol. 10. In Arkiv for Matematik. pp.23-31. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203448368358162.