updated README

Author: SouradiptoC

README.md

@@ -1,14 +1,29 @@
 # README
+
 [![PyPI - License](https://img.shields.io/pypi/l/CodonU)](https://opensource.org/licenses/MIT)
 [![DOI](https://zenodo.org/badge/536583655.svg)](https://zenodo.org/badge/latestdoi/536583655)
 [![PyPI - Python Version](https://img.shields.io/pypi/pyversions/CodonU)](https://pypi.org/project/CodonU)
 [![PyPI](https://img.shields.io/pypi/v/CodonU)](https://pypi.org/project/CodonU)
 ![GitHub repo size](https://img.shields.io/github/repo-size/SouradiptoC/codon_usage)
 [![PyPI - Format](https://img.shields.io/pypi/format/CodonU)](https://pypi.org/project/CodonU)
 
-
-The package can easily can help in various ways from fetching genebank files from NCBI with the help of accession id to calculating cai, cbi, rscu, enc values and also can generate good quality graphics such as enc plot, or correspondence analysis plot
+The package can easily can help in various ways from fetching genebank files from NCBI with the help of accession id to
+calculating cai, cbi, rscu, enc values and also can generate good quality graphics such as enc plot, or correspondence
+analysis plot
 <br>
 Updates will be done on a regular basis.
 
-A complete doumentation is available [here](https://github.com/SouradiptoC/codon_usage/wiki)
+A complete doumentation is available [here](https://github.com/SouradiptoC/codon_usage/wiki).
+
+Please cite the work as
+
+    @software{souradipto_choudhuri_2023_7657797,
+      author       = {Souradipto Choudhuri},
+      title        = {CodonU},
+      month        = feb,
+      year         = 2023,
+      publisher    = {Zenodo},
+      version      = {v1.0.0},
+      doi          = {10.5281/zenodo.7657797},
+      url          = {https://doi.org/10.5281/zenodo.7657797}
+    }