@article{10_4171_ifb_114,
     author = {Gregory Rapuch},
     title = {American options and the free boundary exercise region: a {PDE} approach},
     journal = {Interfaces and free boundaries},
     pages = {79--98},
     year = {2005},
     volume = {7},
     number = {1},
     doi = {10.4171/ifb/114},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/ifb/114/}
}