C Shobana Nageswari, et al. “Information Preserving and Edge Smoothening of Fetal Heart Chamber Using SRDCF With Total Variation”. Journal of Population Therapeutics and Clinical Pharmacology, vol. 30, no. 13, June 2023, pp. 136-44, https://doi.org/10.47750/jptcp.2023.30.13.014.