Baysal, Tamer, Ramazan Kutlu, Tayfun Altinok, and Yasar Durmaz. “Value Of Superficial Ultrasonography In Determination Of Intramuscular Injection Technique And Needle Size On Infant Vaccination”. Annals of Medical Research 9, no. 3 (May 25, 2021): 0191–0194. Accessed May 15, 2024. http://www.annalsmedres.org/index.php/aomr/article/view/2919.