Add also PRL journal citation

Author: mbgado

README.md

@@ -2,7 +2,7 @@
 
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-In this repository, we implemented and trained the SciNet network described in: [https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.124.010508](Iten, R., Metger, T., Wilming, H., Rio, L., & Renner, R. (2020). Discovering Physical Concepts with Neural Networks. Phys. Rev. Lett., 124, 010508.)
+In this repository, we implemented and trained the SciNet network described in: [Iten, R., Metger, T., Wilming, H., Rio, L., & Renner, R. (2020). Discovering Physical Concepts with Neural Networks. Phys. Rev. Lett., 124, 010508.](https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.124.010508)
 [[arXiv:1807.10300v3](https://arxiv.org/abs/1807.10300v3)].
 SciNet attempts to formalize a simplified view of physical modelling thinking process and translate it into a neural network architecture.