les 4 batallescontra la Sobirania "La transformación del concepto de soberanía"; Hans Kelsen https://www.scribd.com/document/246793439/Kelsen-La-Transformacion-Del-Concepto-de-Soberania https://www.ugr.es/~redce/REDCE18/articulos/12_KELSEN.htm https://ca.wikipedia.org/wiki/Hans_Kelsen tornar