@article{AM2_1986__31_137137,
     author = {Niels Jacob and Bernd Schomburg},
     title = {On {Gardings} inequality.},
     journal = {Aequationes mathematicae},
     pages = {7--17},
     publisher = {mathdoc},
     volume = {31},
     year = {1986},
     zbl = {0635.35011},
     url = {http://geodesic.mathdoc.fr/item/AM2_1986__31_137137/}
}