Gruther, W., Benesch, T., Zorn, C., Paternostro-Sluga, T., Quittan, M., Fialka-Moser, V., Spiss, C., Kainberger, F. and Crevenna, R. (2008) “ quadriceps femoris muscle layer”., Journal of Rehabilitation Medicine, 40(3), pp. 185–189. doi: 10.2340/16501977-0139.