Meng Zhang 0035 Lihua Fu Tingting He Gaofeng Wang 0002 Non-flat Function Estimation Using Orthogonal Least Squares Regression with Multi-scale Wavelet Kernel. 632-641 2007 conf/isnn/2007-1 ISNN (1) https://doi.org/10.1007/978-3-540-72383-7_75 db/conf/isnn/isnn2007-1.html#ZhangFHW07