Merge pull request #38 from isi-usc-edu/rroodll-patch-2

Update index.rst

Author: akurlej

docs/index.rst

@@ -9,6 +9,14 @@ Welcome to pyLIQTR's documentation!
 **pyLIQTR** is a MIT Lincoln Laboratory built library for building quantum circuits derived from quantum algorithms and generating Clifford+T resource estimates.
 
 
+Citation
+===================================
+
+Please use this DOI number reference, published on [Zenodo](https://zenodo.org), when citing the software:
+
+[![DOI](image.png)](https://doi.org/10.5281/zenodo.7221272)
+
+
 User Documentation
 ===================================
 
@@ -47,4 +55,4 @@ Indices and tables
    :template: custom-module-template.rst
    :recursive:
 
-   pyLIQTR
+   pyLIQTR