@article{10_4171_ifb_152,
     author = {Giovanni Bellettini and M. Chermisi and Matteo Novaga},
     title = {Crystalline curvature flow of planar networks},
     journal = {Interfaces and free boundaries},
     pages = {481--521},
     year = {2006},
     volume = {8},
     number = {4},
     doi = {10.4171/ifb/152},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/ifb/152/}
}