Serce, Gokhan İsık, and Evrim Kucur Tulubas. “Comparison of Ultrasonography-Guided Pectoral Nerve Block With Patient-Controlled Analgesia for Breast Surgery Patients”. The European Research Journal, vol. 7, no. 2, Mar. 2021, pp. 136-41, https://doi.org/10.18621/eurj.584619.