T. M. Aswathi, R. Ephraim, A. Ayilliath, and S. Chandrashekhar, Trans., “Supernumeraries: No more an added number, but an added advantage”, Indian J Case Reports, vol. 6, no. 2, pp. 81–83, Feb. 2020, doi: 10.32677/IJCR.2020.v06.i02.013.