1. A method for the solution of certain non-linear problems in least squares;Levenberg;Quart. Applied Mathematics,1944
2. An algorithm for least squares estimation of non-linear parameters;Marquardt;Journal of SAIM,1963
3. Detecting strange attractors in turbulence;Takens,1981
4. Non-linear independent component analysis using ensemble learning: Experiments and discussions;Valpola,2000
5. Singular spectrum analysis: A toolkit for short noisy and chaotic time series;Vautard;Physica D,1992