@article{AIHPC_2008__25_2_369_0,
     author = {Pingen, Michael},
     title = {Regularity results for degenerate elliptic systems},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {369--380},
     publisher = {Elsevier},
     volume = {25},
     number = {2},
     year = {2008},
     doi = {10.1016/j.anihpc.2007.02.008},
     mrnumber = {2400107},
     zbl = {1152.35043},
     language = {en},
     url = {http://archive.numdam.org/articles/10.1016/j.anihpc.2007.02.008/}
}