| 1. | 
        
    Alphen aan den Rijn, Netherlands : Wolters Kluwer, 2001. | 
                | 2. | 
        
    [Place of publication not identified] : [Kluwer Law International (Alphen aan den Rijn, Países Bajos)], 2007. 
English | CH 37 December 2007 Vol 30 No 4 | 
 | 
                | 3. | 
        
    Cambridge, United Kingdom : Cambridge University Press, 2018. 
English | M 17 CON.T 23 | 
 | 
                | 4. | 
        
    [Place of publication not identified] : [Kluwer Law International (Alphen aan den Rijn, Países Bajos)], 2009. 
English | CH 37 | 
 | 
                | 5. | 
        
    [Place of publication not identified] : [Kluwer Law International (Alphen aan den Rijn, Países Bajos)], 2008. 
English | 37 CH | 
 | 
                | 6. | 
        
    [Place of publication not identified] : [Kluwer Law International (Alphen aan den Rijn, Países Bajos)], 2008. 
English | 37 CH | 
 | 
                | 7. | 
        
    Tübingen : M. Siebeck, 1998. 
German | T 21 BAS.W | 
 |