1. Nonlinear estimation by iterative least squares procedures;Wold,1966
2. Model construction and evaluation when theoretical knowledge is scarce. Theory and application of partial least squares;Wold,1980
3. Soft modeling. The basic design and some extensions;Wold,1982
4. Pattern recognition: Finding and using patterns in multivariate data;Wold,1983
5. The multivariate calibration method in chemistry solved by the PLS method;Wold,1983