Roy, A. S., Tandon, P., Chandna, A. K., Sharma, V. P., Nagar, A., & Singh, G. P. (1970). Jaw Morphology and Vertical Facial Types: A Cephalometric Appraisal. Journal of Orofacial Research, 2(3), 131-138. https://www.mansapublishers.com/jofr/article/view/1759