In this paper, by a vanishing viscosity approach, we investigate Riemannian solutions containing delta shock waves with Dirac delta functions in both state variables for a class of non-strictly hyperbolic systems of conservation laws. The existence and uniqueness of solutions for the viscous problem are shown.
"Viscous limits for a Riemannian problem to a class of systems of conservation laws." Rocky Mountain J. Math. 48 (5) 1721 - 1741, 2018. https://doi.org/10.1216/RMJ-2018-48-5-1721