Add full paper reference including DOI to README

README.md

@@ -7,15 +7,14 @@ This package is composed by two parts:
 - A MATLAB implementation of the partial information decomposition
   (PID) for distributions over three random variables using the
   definitions from Bertschinger, N., Rauh, J., Olbrich, E., Jost, J.,
-  and Ay, N. *Quantifying unique information.* Entropy,
-  16(4):2161–2183, 2014.
+  and Ay, N. *Quantifying unique information.*. Entropy 2014,
+  16(4):2161–2183.
 - A MATLAB numerical implementation of the subatomic partial
   information decomposition proposed in Pica, G., Piasini, E.,
   Chicharro, D., and Panzeri, S. *Invariant Components of Synergy,
-  Redundancy, and Unique Information Among Three Variables.*, to
-  appear in Entropy,
-  [arXiv:1706.08921 \[cs.IT\]](https://arxiv.org/abs/1706.08921),
-  2017.
+  Redundancy, and Unique Information Among Three Variables.*. Entropy
+  2017, 19, 451,
+  doi:[10.3390/e19090451](https://dx.doi.org/10.3390/e19090451).
 
 ## Requirements