Joseph Onuwa Umunnah, Grace Chikodili Orji, Christian Arinze Okonkwo, Chigozie Ikenna Uchenwoke, and Justina Adaora Okemuo, “Prevalence and types of pes planus in a sample of Nigerian college students”, ijamscr, vol. 9, no. 2, pp. 259–265, Jun. 2021.