Hopt, Klaus J. MPI for Comparative and International Private Law, Max Planck Society;
https://hwb-eup2009.mpipriv.de/index.php/Internationale_Handelskammer (Any fulltext)
Hopt, K. J. (2009). Internationale Handelskammer. In J. Basedow, K. J. Hopt, & R. Zimmermann (Eds.), Handwörterbuch des Europäischen Privatrechts (pp. 896-899). Tübingen: Mohr Siebeck.