Baum, Harald MPI for Comparative and International Private Law, Max Planck Society;
https://hwb-eup2009.mpipriv.de/index.php/Insidergesch%C3%A4ft (Any fulltext)
Baum, H. (2009). Insidergeschäfte. In J. Basedow, K. J. Hopt, R. Zimmermann, & M. Illmer (Eds.), Handwörterbuch des Europäischen Privatrechts Bd. I (pp. 866-870). Tübingen: Mohr Siebeck.