readme: link to paper

README.md

@@ -4,7 +4,7 @@
 [Pierre Vandergheynst](https://people.epfl.ch/pierre.vandergheynst), Xavier
 Bresson, [EPFL LTS2](http://lts2.epfl.ch).
 
-* Paper: <https://arxiv.org/>
+* Paper: <https://arxiv.org/abs/1612.01840>
 * Code: <https://github.com/mdeff/fma/>
 * Datasets: <https://lts2.epfl.ch/datasets/fma/>
 
@@ -15,5 +15,7 @@ This repository features the following notebooks:
 2. [Analysis](fma_analysis.ipynb): loading and basic analysis of the data.
 3. [Baseline](fma_baseline.ipynb): baseline models for various tasks.
 
+To use the dataset, see the [usage](fma_usage.ipynb) notebook.
+
 Please cite our paper if you use our code or data.
 The code is released under the terms of the [MIT license](LICENSE.txt).