Update README.md

README.md

@@ -18,6 +18,7 @@ If you use any part of our codes, please cite our paper.
 W. Zhou, H. -T. Zhang and J. Wang, "An Efficient Sparse Bayesian Learning Algorithm Based on Gaussian-Scale Mixtures," IEEE Transactions on Neural Networks and Learning Systems, doi: 10.1109/TNNLS.2020.3049056.
 
  bibtex: 
+
 @ARTICLE{zhou2021efficient,
   author={W. {Zhou} and H.-T. {Zhang} and J. {Wang}},
   journal={IEEE Transactions on Neural Networks and Learning Systems},