Allasia, G., Besenghi, R., Cavoretto, R., & De Rossi, A..  (2010).  Efficient approximation algorithms. Part I: approximation of unknown fault lines from scattered data. Dolomites Research Notes on Approximation, 3(1), 7-38. presented at the 09/2010. doi:10.14658/pupj-drna-2010-1-2