\bib{1996/bernstein-3x1conjmap}
\yr 1996
\by Daniel J. Bernstein
\by Jeffery C. Lagarias
\paper The $3x+1$ conjugacy map
\jour Canadian Journal of Mathematics
\issn 0008--414X
\vol 48
\pages 1154--1169
\url http://cr.yp.to/papers.html
\endref