Rühl, Giesela MPI for Comparative and International Private Law, Max Planck Society;
https://hwb-eup2009.mpipriv.de/index.php/Unilateralismus_(IPR) (Any fulltext)
Rühl, G. (2009). Unilateralismus (IPR). In J. Basedow, K. J. Hopt, & R. Zimmermann (Eds.), Handwörterbuch des Europäischen Privatrechts (pp. 1551-1556). Tübingen: Mohr Siebeck.