added bibtex entry

README.md

@@ -45,5 +45,18 @@ On the fastMRI validation dataset
 Further results can be seen on the fastMRI leaderboards for the test and challenge dataset: https://fastmri.org/leaderboards/
 
 
-
+## Bibtex entry
+```
+@inproceedings{Ramzi2020d,
+archivePrefix = {arXiv},
+arxivId = {2010.07290},
+author = {Ramzi, Zaccharie and Ciuciu, Philippe and Starck, Jean-Luc},
+booktitle = {ISMRM},
+eprint = {2010.07290},
+pages = {1--4},
+title = {{XPDNet for MRI Reconstruction: an application to the 2020 fastMRI challenge}},
+url = {http://arxiv.org/abs/2010.07290},
+year = {2021}
+}
+```