added preprints

README.md

@@ -40,7 +40,8 @@ form can be found [here](https://github.com/JLRipley314/2nd-order-teuk-derivatio
 We do not make use of the Kinnersley tetrad in this code.
 Instead, we make use of a rotation of that tetrad, which is described in more detail 
 in Appendix C of [arXiv:2010.00162](https://arxiv.org/abs/2010.00162) 
-(see the bibtex citation at the end of this README).
+(see the bibtex citation at the end of this README; a copy of the oringal preprint form
+of this paper can be found under the ``docs`` directory).
 The upshot of this transformation is that at future null infinity, the real and imaginary
 parts of the Weyl scalar Psi4 limit to *twice* the second time derivative of the
 plus and cross polarizations of the metric perturbation at future null infinity,
@@ -88,6 +89,8 @@ and
 }
 ```
 
+A copy of both of these papers (in preprint form) can be found under the ``docs`` directory.
+
 ## Bug history 
 
 * **June 2023**: I have added one new IO option that was not present in the original code:

docs/Documentation.md

@@ -167,6 +167,13 @@ in the output directory. The binary file the `setup.py` file
 compiles knows where those directories are, if it is run
 in the designated output directory.
 
+# More information
+
+Included in this directory is a copy of the original preprint that described
+this code, as can be found on the arXiv, along with the original preprint 
+which describes in more detail the metric reconstruction technique used
+in this code. 
+
 ## Contribution 
 
 If you have any questions, please email Justin Ripley at: