@article{BUMI_2008_9_1_1_a9,
     author = {Mingione, Giuseppe and Anna, Zatorska-Goldstein and Zhong, Xiao},
     title = {On the {Regularity} of {p-Harmonic} {Functions} in the {Heisenberg} {Group}},
     journal = {Bollettino della Unione matematica italiana},
     pages = {243--253},
     publisher = {mathdoc},
     volume = {Ser. 9, 1},
     number = {1},
     year = {2008},
     zbl = {1164.35039},
     mrnumber = {2388006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BUMI_2008_9_1_1_a9/}
}