academic article

• PRENDERGAST LASMITH JA. Influence Functions for Dimension Reduction Methods: An Example Influence Study of Principal Hessian Direction Analysis.  Scandinavian Journal of Statistics: theory and applications.  37:588-611. 2010
• Prendergast LASmith JA. Sensitivity of principal Hessian direction analysis.  Electronic Journal of Statistics.  1:253-267. 2007