@article{10_4171_ifb_104,
     author = {Ulrich Clarenz},
     title = {The {Wulff} shape minimizes an anisotropic {Willmore} functional},
     journal = {Interfaces and free boundaries},
     pages = {351--359},
     year = {2004},
     volume = {6},
     number = {3},
     doi = {10.4171/ifb/104},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/ifb/104/}
}