D. Giordano, I. Kavasidis, S. Palazzo, C. Spampinato, "Nonparametric Label Propagation using Mutual Local Similarity in Nearest Neighbors", Computer Vision and Image Understanding, vol. 131, pp. 116--127, 2015
"Nature is the source of all true knowledge. She has her own logic, her own laws, she has no effect without cause nor invention without necessity." L. Da Vinci."