Rehman Ali, Trevor M. Mitcham, Thurston Brevett, Oscar Calderon Agudo, Cristina Durán Martinez, Cuiping Li, Marvin M. Doyley, Nebojsa Duric: 2-D Slicewise Waveform Inversion of Sound Speed and Acoustic Attenuation for Ring Array Ultrasound Tomography Based on a Block LU Solver. IEEE Trans. Medical Imaging 43(8): 2988-3000 (2024)