Electrode module for EIT with a robust howland current source - Santos, Rafael Benetti; Santos, André Luis dos; Cavalheiro, André César Martins; Ferro, Rafael Akira Okamura; Moura, Fernando Silva de; González Lima, Raúl; Martins, Thiago de Castro; Tsuzuki, Marcos Sales Guerra (IFAC journal of systems and control, 2024)