@article{10_4171_dm_285,
     author = {Christian Miebach and Karl Oeljeklaus},
     title = {On proper $\mathbb R$-actions on hyperbolic {Stein} surfaces},
     journal = {Documenta mathematica},
     pages = {673--689},
     year = {2009},
     volume = {14},
     doi = {10.4171/dm/285},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/dm/285/}
}