Katchy, Amechi Uchenna, et al. “Morphometric Analysis of Calcaneal Angles in Igbos of South East of Nigeria and Its Clinical Implication: A Plain X-Ray Study”. Nigerian Journal of Orthopaedics and Trauma, vol. 17, no. 2, Dec. 2018, pp. 64-71, https://njot.org/njot/article/view/11.