@Article{jue:12m,
author = {F. Aurenhammer and B. J\"uttler},
title = {On computing the convex hull of (piecewise) curved 
 objects},
year =  {2012},
volume = {6},
pages = {261-266},
journal = {Mathematics in Computer Science},
doi = {10.1007/s11786-012-0111-z}
}