@article{10_2307_121038,
     author = {Hing Sun Luk and Stephen S.-T. Yau},
     title = {Counterexample to boundary regularity of a strongly pseudoconvex {CR} submanifold: {An} addendum to the paper of {Harvey-Lawson}},
     journal = {Annals of mathematics},
     year = {1998},
     volume = {148},
     number = {3},
     doi = {10.2307/121038},
     zbl = {0940.32014},
     url = {http://geodesic.mathdoc.fr/articles/10.2307/121038/}
}