Espahbodi, Ebrahim, Mehdi Sanatkar, and Reza Atef Yekta. “Erector Spine Block (ESB) for Pain Relief in a Patient With Multiple Ribs Fracture”. Acta Medica Iranica 58, no. 2 (June 29, 2020): 83-84. Accessed July 10, 2020. https://acta.tums.ac.ir/index.php/acta/article/view/8025.