@ARTICLE{Hildebrandt2012, author = {Klaus Hildebrandt and Christian Schulz and Christoph von Tycowicz and Konrad Polthier}, title = {Modal shape analysis beyond {L}aplacian}, journal = {Computer Aided Geometric Design}, year = {2012}, volume = {29}, pages = {204--218}, number = {5}, doi = {10.1016/j.cagd.2012.01.001} }