On the existence of invariant measures for piecewise convex transformations
Tom 40 / 1983
                    
                    
                        Annales Polonici Mathematici 40 (1983), 179-184                    
                                        
                        DOI: 10.4064/ap-40-2-179-184                    
                                    
                                                                
                             
             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                         
                                                            