@inproceedings{t.1960likelihood,
title={Likelihood ratios of Gaussian processes},
author={T. S. Pitcher},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203424425998959},
booktitle={Arkiv for Matematik},
volume={4},
number={1},
pages={35-44},
year={1960},
}