@article{10_4064_sm151_1_2,
     author = {Xicheng Zhang},
     title = {Regularity of stopping times of
  diffusion processes in {Besov} spaces},
     journal = {Studia Mathematica},
     pages = {23--29},
     publisher = {mathdoc},
     volume = {151},
     number = {1},
     year = {2002},
     doi = {10.4064/sm151-1-2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm151-1-2/}
}