1. Note on the methods of least squares;Adcok;The Analyst,1877
2. A problem in least squares;Adcok;The Analyst,1878
3. J. C. Agüero. System identification methodologies incorporating constraints. PhD thesis, The University of Newcastle, Callaghan, NSW, Australia, August 2005.
4. J. C. Agüero and G. C. Goodwin. Identifiability of errors in variables dynamic systems. In IFAC Symposium on System Identification, Newcastle, Australia, March 29- 31 2006.
5. J. C. Agüero, G. C. Goodwin, and M. E. Salgado. On the optimal estimation of errors in variables models for robust control. In 16th IFAC World Congress, Prague, Czech Republic, July 4-8 2005.