Hartmut Pasternak,                                                                    Gabriel Kubieniec,                                                                    Marek Piekarczyk                                                            
                                                
                        Abstract  521 |
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                                                                                                                                        | DOI 
                            
                                https://doi.org/10.3846/skt.2010.06
                            
                                                                            
                                
                                Page 45-50
                            
                        
                                            
                                         
                                    
