Hsin Chen, S. et al. 2021. Modified YOLOv4-DenseNet Algorithm for Detection of Ventricular Septal Defects in Ultrasound Images. International Journal of Interactive Multimedia and Artificial Intelligence. 6, 7 (Sep. 2021), 101–108. DOI:https://doi.org/10.9781/ijimai.2021.06.001.