Add CITATION.bib and update README

Author: mroavi

CITATION.bib

@@ -0,0 +1,12 @@
+@article{Roa-Villescas2023, 
+  doi = {10.21105/joss.05700},
+  url = {https://doi.org/10.21105/joss.05700},
+  year = {2023},
+  publisher = {The Open Journal},
+  volume = {8},
+  number = {90},
+  pages = {5700},
+  author = {Martin Roa-Villescas and Jin-Guo Liu},
+  title = {TensorInference: A Julia package for tensor-based probabilistic inference},
+  journal = {Journal of Open Source Software}
+}

README.md

@@ -51,7 +51,7 @@ comprehensive introduction to the package read the
 ## Citing
 
 If you use TensorInference as part of your research, teaching, or other
-activities, please consider citing the following publication: [(TBA)]().
+activities, please consider [citing our work](CITATION.bib).
 
 ## Questions and Contributions