Gupta, B. K., G. Yadav, N. Kumar, V. Mhaske, S. Babu, and G. S. Gautam. “Comparative Evaluation of Interscalene and Interscalene Plus Infraclavicular Brachial Plexus Block for Elbow Surgery Using Nerve Stimulator”. Anaesthesia, Pain & Intensive Care, Jan. 2019, pp. 32-37, https://mail.apicareonline.com/index.php/APIC/article/view/223.