@article{10_4171_dm_305,
     author = {Feng-Yu Wang},
     title = {Semigroup properties for the second fundamental form},
     journal = {Documenta mathematica},
     pages = {527--543},
     year = {2010},
     volume = {15},
     doi = {10.4171/dm/305},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/dm/305/}
}