Yadav, Yogesh, Preeti Goswami, and Chakradhar Vellalacheruvu. 2017. “Ossified Pterygo-Spinous Ligament: Incidence and Clinico-Anatomical Relevance in the Adult Human Skulls of North India”. International Journal of Research in Medical Sciences 2 (3):847-51. https://www.msjonline.org/index.php/ijrms/article/view/2275.