@article{10_4064_aa131_3_2,
     author = {John L. Simons},
     title = {On the (non-)existence of $m$-cycles
 for generalized {Syracuse} sequences},
     journal = {Acta Arithmetica},
     pages = {217--254},
     publisher = {mathdoc},
     volume = {131},
     number = {3},
     year = {2008},
     doi = {10.4064/aa131-3-2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa131-3-2/}
}