Ivan Obadiah, Deepa Gurunathan, and Vignesh Ravindran, “Requirements of Back to Back Crowns in Children Aged 2 to 6 Years in Mandibular Arch - An Observational Study”, Int. J. Res. Pharm. Sci., vol. 11, no. (SPL 3), pp. 1529–1534, Oct. 2020.