1. Shape preserving approximation using least squares splines;Beliakov;Approximation theory and applications,2000
2. Monotone approximation of aggregation operators using least squares splines;Beliakov;Int. J. of Uncertainty, Fuzziness and, Knowledge-Based Systems,2002
3. How to build aggregation operators from data?;Beliakov;Int. J. Intelligent Systems,2003
4. Least squares splines with free knots: global optimization approach;Beliakov;Applied Mathematics and Computation,2004
5. A Practical Guide to Splines;De Boor,1978