A. Maharjan, S. P. Panday, and L. N. Regmi, “3D Frequency-Difference Electrical Impedance Tomography for Early Subcutaneous Edema Detection Using Tikhonov Regularization and Physics-Informed Neural Networks”, Int. J. Engin. Technol., vol. 3, no. 2, pp. 52–61, Jun. 2026.