docs : updated readme with repository, paper link

README.md

@@ -1,7 +1,35 @@
 # Snake Kinematics Sandbox
 
-A sandbox to play around with a kinematic model of snake-locomotion, with and
+An interactive online sandbox to play around with a kinematic model of snake-locomotion, with and
 without active frictional modulation.
 
-The online sandbox can be seen [here](https://gazzolalab.github.io/kinematic_snake_sandbox/).
-The numerical code powering the simulator can be found here : TODO
+> :rocket: The online sandbox can be seen [here](https://gazzolalab.github.io/kinematic_snake_sandbox/).
+
+The numerical code (written in `Python`) powering the simulator [can be found here](https://github.com/tp5uiuc/kinematic_snake).
+
+## What is it?
+An online, interactive simulator that provides intuition for the behavior of a snake as it adapts its gait in terrains of various nature.
+
+If you are using code taken from this repository please cite the following paper :)
+
+<strong>Friction modulation in limbless, three-dimensional gaits and heterogeneous terrains</strong>, doi : [10.1038/s41467-021-26276-x](https://doi.org/10.1038/s41467-021-26276-x)
+
+```
+@Article{Zhang2021,
+author={Zhang, Xiaotian
+and Naughton, Noel
+and Parthasarathy, Tejaswin
+and Gazzola, Mattia},
+title={Friction modulation in limbless, three-dimensional gaits and heterogeneous terrains},
+journal={Nature Communications},
+year={2021},
+month={Oct},
+day={19},
+volume={12},
+number={1},
+pages={6076},
+issn={2041-1723},
+doi={10.1038/s41467-021-26276-x},
+url={https://doi.org/10.1038/s41467-021-26276-x}
+}
+```