@article{1994-bernstein
,note={URL: {\tt http://cr.yp.to/papers.html}}
,author={Daniel J. Bernstein}
,ISSN={0002--9939}
,journal={Proceedings of the American Mathematical Society}
,pages={405--408}
,title={{A non-iterative $2$-adic statement of the $3N+1$ conjecture}}
,volume={121}
,year={1994}
}