update readme

README.md

 # SemiSmoothNewton
 
-Research code to produce numerical results for [1].
+Research code to produce numerical results for [1, 2].
 Read and use at your own risk.
 
-[1] Martin Alkämper, Stephan Hilb and Andreas Langer. 'A primal-dual adaptive
-finite element method for scalar and vectorial total variation minimization'.
-In preparation. 2022
+## Getting started
+
+Adjust data paths and experiments in `run.jl`, install dependencies and run:
+```julia
+using Pkg; Pkg.instantiate()
+include("run.jl")
+```
+
+## References
+
+[1] Hilb S., Langer A, Alkämper M.: A primal-dual finite element method for
+scalar and vectorial total variation minimization. Journal of Scientific
+Computing 96, 24 (2023).
+https://doi.org/10.1007/s10915-023-02209-2
+[2] Hilb S., Langer A, Alkämper M.: A primal-dual adaptive finite element
+method for total variation minimization. (2024). \[Submitted\]