S. Vasantha Mounika, P. Ramya, M.S.L. Divya, S. Naga Swaroopa, K. V. Raju, and N.L. Prasanthi. “A Study of Regulatory Aspects on Registration of Orphan Drugs in US and EU”. International Journal of Drug Regulatory Affairs, Vol. 10, no. 4, Dec. 2022, pp. 45-52, doi:10.22270/ijdra.v10i4.563.