Nasreen, Amina, Amin M. Khuwaja, Parveen Akhtar, Najma Amjad, and Zahid Akhtar Rao. 2019. “A Randomized Comparison of Ultrasound Guided Versus Direct Palpation Method of Radial Artery Cannulation Techniques in Adult Patients Undergoing Open Heart Surgery”. Anaesthesia, Pain & Intensive Care, January, 38-42. https://mail.apicareonline.com/index.php/APIC/article/view/224.