@article{NUMA_1984__44_132944,
     author = {Richard Haverkamp},
     title = {Eine {Aussage} zur {L...-Stabilit\"at} und zur genauen {Konvergenzordnung} der {H...-Projektionen.}},
     journal = {Numerische Mathematik},
     pages = {393--406},
     publisher = {mathdoc},
     volume = {44},
     year = {1984},
     zbl = {0575.65012},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1984__44_132944/}
}