Add citation to README

Author: mikeheddes

README.md

@@ -35,6 +35,17 @@ conda install -c torchhd torchhd
 
 You can find documentation for Torchhd [on the website](https://torchhd.readthedocs.io).
 
+Check out the [Getting Started](https://torchhd.readthedocs.io/en/stable/getting_started.html) page for a quick overview.
+
+The API documentation is divided into several sections:
+
+- [`torchhd.functional`](https://torchhd.readthedocs.io/en/stable/functional.html)
+- [`torchhd.embeddings`](https://torchhd.readthedocs.io/en/stable/embeddings.html)
+- [`torchhd.structures`](https://torchhd.readthedocs.io/en/stable/structures.html)
+- [`torchhd.datasets`](https://torchhd.readthedocs.io/en/stable/datasets.html)
+
+You can improve the documentation by sending pull requests to this repository.
+
 ## Examples
 
 We have several examples [in the repository](https://github.com/hyperdimensional-computing/torchhd/tree/main/examples). Here is a simple one to get you started:
@@ -100,3 +111,17 @@ To build the documentation locally, use `pip install -r docs/requirements.txt` t
 ### License
 
 This library is [MIT licensed](https://github.com/hyperdimensional-computing/torchhd/blob/main/LICENSE).
+
+
+## Cite
+
+Consider citing [our paper](https://arxiv.org/abs/2205.09208) if you use Torchhd in your work:
+
+```
+@article{heddes2022torchhd,
+  title={Torchhd: An Open-Source Python Library to Support Hyperdimensional Computing Research},
+  author={Heddes, Mike and Nunes, Igor and Vergés, Pere and Desai, Dheyay and Givargis, Tony and Nicolau, Alexandru},
+  journal={arXiv preprint arXiv:2205.09208},
+  year={2022}
+}
+```