Properties of Morphological Operators Applied to Analysis of ECG Signals. - Krzysztof Piekarski; Pawel Tadejko; Waldemar Rakowski (Biometrics, Computer Security Systems and Artificial Intelligence Applications, 2006)

On Toeplitz Matrices Minimal Eigenvalues in Moving Object Description. - Khalid Saeed 001; Krzysztof Piekarski (CISIM, 2007)