Gediminas Marčiukaitis                                                            
                                                
                        Abstract  653 |
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                                                                                                                                        | DOI 
                            
                                https://doi.org/10.3846/13921525.2001.10531721
                            
                                                                            
                                
                                Page 177-183
                            
                        
                                            
                                         
                                     
  

