B. Cetin, O. Saglam, E. Dursun, U. Karapinar, O. Z. Yondem, and B. Aydemir, “Hearing Loss Preventions And Safety Of The Spinal Anaesthesia Which Performed At Two Different Levels”, AJMR, vol. 4, no. 4, pp. 1-3, Sep. 2015.