@inproceedings{casper1953one-one,
title={One-one measurable transformations},
author={Casper Goffman},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203137782785780},
booktitle={Acta Mathematica},
volume={89},
number={1},
pages={261-278},
year={1953},
}

Casper Goffman. One-one measurable transformations. 1953. Vol. 89. In Acta Mathematica. pp.261-278. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203137782785780.