@article{silva_mexia_2006, 
  title={Least squares estimator consistency: a geometric approach}, 
  volume={26}, 
  DOI={10.7151/dmps.1073}, 
  publisher={Faculty of Mathematics, Computer Science and Econometrics, University of Zielona Gora}, 
  author={Silva and Mexia}, 
  year={2006}
  }