Stamer, Ulrike; Erlenwein, Joachim; Freys, Stephan M.; Stammschulte, Thomas; Stichtenoth, Dirk; Wirz, Stefan (2021). Perioperative analgesia with nonopioid analgesics. Der Chirurg, 92(7), pp. 647-663. 10.1007/s00104-021-01421-w