Bajwa, Sukhminder Jit Singh, and Veenita Sharma. “Can Ultrasonography Help in Reducing Post Spinal Headache?”. Anaesthesia, Pain & Intensive Care (January 27, 2019): 222-225. Accessed November 8, 2024. https://mail.apicareonline.com/index.php/APIC/article/view/348.