Two methods of robust estimation of a covariance matrix - a practice study for some liver data. - Joanna Zdziarek (ACS, 2001)

Choosing representative data items: Kohonen, Neural Gas or Mixture Model? - Anna Bartkowiak; Joanna Zdziarek; Niki Evelpidou; Andreas Vassilopoulos (Enhanced Methods in Computer Security, Biometric and Artificial Intelligence Systems, 2005)