Gradoni, Lorenzo Department I, Max Planck Institute Luxembourg, Max Planck Society;
https://opil.ouplaw.com/view/10.1093/law-mpeipro/e3230.013.3230/law-mpeipro-e3230?rskey=VcR7gr&result=1&prd=MPIL (Publisher version)
Gradoni, L. (2019). 'Four Corners' Doctrine. In H. Ruiz Fabri (Ed.), Max Planck Encyclopedia of International Procedural Law. Oxford: Oxford University Press.