TY  - JOUR
AU  - Jason P. Bell
AU  - Jeffrey C. Lagarias
TI  - $3x+1$ inverse orbit generating functions
 almost always have natural boundaries
JO  - Acta Arithmetica
PY  - 2015
SP  - 101
EP  - 120
VL  - 170
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/aa170-2-1/
DO  - 10.4064/aa170-2-1
LA  - en
ID  - 10_4064_aa170_2_1
ER  -