@article{IM_1985__79_143208,
     author = {Matthew G. Brin and Craig C. Squier},
     title = {Groups of piecewise linear homeomorphisms of the real line.},
     journal = {Inventiones mathematicae},
     pages = {485--498},
     publisher = {mathdoc},
     volume = {79},
     year = {1985},
     zbl = {0563.57022},
     url = {http://geodesic.mathdoc.fr/item/IM_1985__79_143208/}
}