Leon Bobrowski Magdalena Topczewska Induction of Similarity Measures for Case Based Reasoning Through Separable Data Transformations. 127-148 2008 Case-Based Reasoning on Images and Signals http://dx.doi.org/10.1007/978-3-540-73180-1_4 series/sci/2008-73 db/series/sci/sci73.html#BobrowskiT08