Ogawa R, Hyakusoku H (2006). "Does Egyptian foot present an increased risk of ingrown toenail?". Plastic and Reconstructive Surgery. 117 (6): 2111–2112. doi:10.1097/01.prs.0000214750.33936.45. PMID16652022.
d'Août, K.; Pataky, T.C.; De Clercq, D.; Aerts, P. (2009). "The effects of habitual footwear use: Foot shape and function in native barefoot walkers†". Footwear Science. 1 (2): 81–94. doi:10.1080/19424280903386411. S2CID56238052.
Ellington, JK (December 2011). "Hammertoes and clawtoes: proximal interphalangeal joint correction". Foot and Ankle Clinics. 16 (4): 547–58. doi:10.1016/j.fcl.2011.08.010. PMID22118228.
d'Août, K.; Pataky, T.C.; De Clercq, D.; Aerts, P. (2009). "The effects of habitual footwear use: Foot shape and function in native barefoot walkers†". Footwear Science. 1 (2): 81–94. doi:10.1080/19424280903386411. S2CID56238052.