Sommaire du Fascicule no. 1
        p. 49-62
        
        
        
        
      
    
  Sommaire du Fascicule no. 3
        p. 319-328
        
        
        
        
      
    
  
        p. 347-363
        
        
        
        
      
    
  
      
      
        
      
      
  
    
    
    On the connection between spectral and oscillation properties of the Sturm--Liouville matrix problem
    
    
  
  
  
        
          
        
      
 
      
        p. 365-378
        
        
        
        
      
    
  Sommaire du Fascicule no. 4
        p. 425-443
        
        
        
        
      
    
  
        p. 479-491
        
        
        
        
      
    
  