“NomosKommentar, BGB (German Civil Code),volume 2/1, 2nd edition, law of obligations, sections 241 – 610 and volume 2/2, 2nd edition, law of obligations, sections 611 – 853” have been published by Nomos  in January 2012. Dr. Joachim Wichert is the author of the commentary on the title 10, brokerage contract (sections 652 – 656). Joachim Hund-von Hagen is the author of the commentary on the title 22, promise of obligation, acknowledgement of obligation (sections 780 – 782).