On the Baire order of concentrated spaces and $L_1$ spaces
Tom 94 / 1977
                    
                    
                        Fundamenta Mathematicae 94 (1977), 165-172                    
                                        
                        DOI: 10.4064/fm-94-2-165-172                    
                                    
                                                                
                             
             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                         
                                                            