Add links to repo and preprint, Citation section placeholder.

README.md

@@ -10,3 +10,16 @@ The analysis pipelines produce the major results, whereas the scripts and result
 We have taken great care in trying to ensure that this repository contains any information that might be needed in addition to the manuscript and supplement itself, should someone want to reproduce our results.
 Should you nevertheless find that any information you require is missing, please do not hesitate to [open an issue](https://github.com/ProSolo/benchmarking_prosolo/issues/new/choose) to let us know.
 
+## ProSolo command-line tool
+
+For the ProSolo command-line tool, how to install it and how to use it, please head over to its repo:
+https://github.com/ProSolo/prosolo
+
+## ProSolo preprint
+
+For the preprint, please head over to biorxiv:
+https://doi.org/10.1101/2020.04.27.064071
+
+## Citing ProSolo
+
+A link to the peer-reviewed and published manuscript to cite will be added here upon publication.