Zimdahl W, Velten H, Algoner WC. Matter Growth in Imperfect Fluid Cosmology. Universe. 2019;5:68.

Fabris JC, Velten H, Wojnar A. Existence of static spherically-symmetric objects in action-dependent Lagrangian theories. Phys. Rev. 2019;D99:124031.

Perenon L, Velten H. The effective field theory of dark energy diagnostic of linear Horndeski theories after GW170817 and GRB170817A. Proceedings, 3rd José Plínio Baptista School of Cosmology: The Dark Sector of the Universe (JPBCosmo3): Pedra Azul, Brazil, September 25-30, 2016. 2019;5:138.

Brando G, Falciano FT, Linder EV, Velten HES. Modified Gravity Away from a $Łambda$CDM Background. JCAP. 2019;1911:018.