Oriji, P. C., E. K. Kiridi, D. C. Briggs, J. U. Ugwoegbu, A. E. Ubom, A. A. Ojanerohan, I. J. Abasi, B. Panebi, C. Okechukwu, and A. A. Daniel. “Evaluation of Foetal Tricuspid Annular Plane Systolic Excursion With Conventional M-Mode Ultrasound in Normal Pregnancy”. International Journal of Contemporary Pediatrics, vol. 9, no. 12, Nov. 2022, pp. 1141-8, doi:10.18203/2349-3291.ijcp20223059.