@article{10_4153_CJM_1997_026_3,
     author = {Mateu, Joan},
     title = {A {Counterexample} in {Lp} {Approximation} by {Harmonic} {Functions}},
     journal = {Canadian journal of mathematics},
     pages = {568--582},
     year = {1997},
     volume = {49},
     number = {3},
     doi = {10.4153/CJM-1997-026-3},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1997-026-3/}
}