Comparison of ratio loaded and unloaded foot area of flat foot and healthy foot in younger adultsGunawan Dwi Haryadi, Dwi Basuki Wibowo, Achmad Widodo and Agus SuprihantoMATEC Web of Conferences, 159 (2018) 02019DOI: https://doi.org/10.1051/matecconf/201815902019