“The Principle of Mutability or Flexibility in the Modification of the Contract of Concession of Public Services and Public Works of Infrastructure Subscribed in the Legal Framework of Public-Private Partnerships "” (2015) Derecho & Sociedad, (45), pp. 15–34. Available at: https://revistas.pucp.edu.pe/index.php/derechoysociedad/article/view/15221 (Accessed: 19 September 2026).