R-parity Violation and General Soft Supersymmetry Breaking
  We consider the most general class possible of soft supersymmetry breaking terms that can be added to the MSSM, with and without R-parity violation, consistent with the sole requirement that no quadratic divergences are induced. We renormalise the resulting theory through one loop and give an example of how a previously ignored term might affect the sparticle spectrum. 
I. Jack, D.R.T. Jones, A.F. Kord