Ron Kimmel Ravi Malladi Nir A. Sochen Images as Embedding Maps and Minimal Surfaces: A Unified Approach for Image Diffusion. 368-371 1997 ICIP (3) http://doi.ieeecomputersociety.org/10.1109/ICIP.1997.632121 db/conf/icip/icip1997-3.html#KimmelMS97