@inproceedings{h.1968determining,
title={Determining the absolutely continuous component of a probability distribution from its Fourier-Stieltjes transform},
author={H. Robert van der Vaart},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203439993919091},
booktitle={Arkiv for Matematik},
volume={7},
number={4},
pages={331-342},
year={1968},
}
H. Robert van der Vaart. Determining the absolutely continuous component of a probability distribution from its Fourier-Stieltjes transform. 1968. Vol. 7. In Arkiv for Matematik. pp.331-342. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203439993919091.