Povorozniuk, V., Bystritskaya, M., Karasevskaya, T., & Orlik, T. (2009). The efficacy of Olfen-plaster drug preparation in treating pains in the lower back of old patients. ORTHOPAEDICS TRAUMATOLOGY and PROSTHETICS, (3), 53–56. https://doi.org/10.15674/0030-59872009353-56