B. Heller

[Flupirtine in comparison with chlormezanone in chronic musculoskeletal back pain. Results of a multicenter randomized double-blind study].

J. Krainick, W. Bolten, R. Wörz, 1996, Fortschritte der Medizin.

Oxaprozin versus diclofenac in NSAID-refractory periarthritis pain of the shoulder

R. Tarricone, B. Heller, 2004, Current medical research and opinion.