APA

Steigerwald I., Müller M., Kujawa J., Balblanc J. & Calvo-Alén J. (20121002). Effectiveness and safety of tapentadol prolonged release with tapentadol immediate release on-demand for the management of severe, chronic osteoarthritis-related knee pain: results of an open-label, phase 3b study. : Journal of pain research.

Chicago

Steigerwald Ilona, Müller Matthias, Kujawa Jolanta, Balblanc Jean-Charles and Calvo-Alén Jaime. 20121002. Effectiveness and safety of tapentadol prolonged release with tapentadol immediate release on-demand for the management of severe, chronic osteoarthritis-related knee pain: results of an open-label, phase 3b study. : Journal of pain research.

Harvard

Steigerwald I., Müller M., Kujawa J., Balblanc J. and Calvo-Alén J. (20121002). Effectiveness and safety of tapentadol prolonged release with tapentadol immediate release on-demand for the management of severe, chronic osteoarthritis-related knee pain: results of an open-label, phase 3b study. : Journal of pain research.

MLA

Steigerwald Ilona, Müller Matthias, Kujawa Jolanta, Balblanc Jean-Charles and Calvo-Alén Jaime. Effectiveness and safety of tapentadol prolonged release with tapentadol immediate release on-demand for the management of severe, chronic osteoarthritis-related knee pain: results of an open-label, phase 3b study. : Journal of pain research. 20121002.