Inverse acoustic scattering problem in half-space with anisotropic random impedance [Online resource]Helin, Tapio; Lassas, Matti; Päivärinta, Lassi JuhaniarXiv.org2014 / p. 1-26 https://arxiv.org/abs/1407.2481v2

Positive-energy D-bar method for acoustic tomography : a computational studyde Hoop, M. V.; Lassas, Matti; Santacesaria, M.; Siltanen, Samuli; Tamminen, Janne Pertti OlaviInverse problems2016 / art, 025003, p. 1-35 : ill http://dx.doi.org/10.1088/0266-5611/32/2/025003