@article{MZ_1992__211_3_174444,
     author = {Luen-Fai Tam},
     title = {Harmonic functions on connected sums of manifolds.},
     journal = {Mathematische Zeitschrift},
     pages = {315--322},
     year = {1992},
     volume = {211},
     number = {3},
     zbl = {0764.53037},
     url = {http://geodesic.mathdoc.fr/item/MZ_1992__211_3_174444/}
}