@inproceedings{f.1954rearrangements, title={Rearrangements of$C$_{1}-summable series}, author={F. Bagemihl, and P. Erdös}, url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203140832325801}, booktitle={Acta Mathematica}, volume={92}, number={1}, pages={35-53}, year={1954}, }