1. Nielsen J.B., Sjøgren P., (2008): Clonidine in the treatment of cancer pain. Ugeskr. Laeger., 170, 3650–3653.
2. Zółkowska D., Pikuła A., Borzecki A., Sieklucka-Dziuba M., (2000): Interaction between local anesthetics and centrally acting antihypertensive drugs. Ann. Univ. Mariae Curie Sklodowska Med., 57, 569–573.
3. Dobrydnev I.L., Tsygankova O.I., (1999): Clinical experience in the use of Clonidine in regional anesthesia and early postoperative period (1984-1989). Anesteziol. Reanimatol., 3, 4–12.
4. Reuben S.S., Connelly N.R., (1999): Postoperative analgesia for outpatient arthroscopic knee surgery with intraarticular Clonidine. Anesth. Analg., 88, 729–733
5. Joshi W., Reuben S.S., Kilaru P.R., Sklar J., Maciolek H., (2000): Postoperative analgesia for outpatient arthroscopic knee surgery with intraarticular Clonidine and/or morphine. Anesth. Analg., 90, 1102–1106.