@article{JOLT_1997_7_2_a6,
     author = {K. Koufany and B. Oersted},
     title = { Hardy {Spaces} on {Two-Sheeted} {Covering} {Semigroups}},
     journal = {Journal of Lie Theory},
     pages = {245--268},
     year = {1997},
     volume = {7},
     number = {2},
     zbl = {0884.22006},
     url = {http://geodesic.mathdoc.fr/item/JOLT_1997_7_2_a6/}
}