ADD: official paper & citation (#158)

CITATION.bib

@@ -0,0 +1,12 @@
+@article{Auriau2024,
+doi = {10.21105/joss.06899},
+url = {https://doi.org/10.21105/joss.06899},
+year = {2024},
+publisher = {The Open Journal},
+volume = {9},
+number = {101},
+pages = {6899},
+author = {Vincent Auriau and Ali Aouad and Antoine Désir and Emmanuel Malherbe},
+title = {Choice-Learn: Large-scale choice modeling for operational contexts through the lens of machine learning},
+journal = {Journal of Open Source Software}
+}

CITATION.cff

@@ -0,0 +1,38 @@
+# This CITATION.cff file was generated with cffinit.
+# Visit https://bit.ly/cffinit to generate yours today!
+
+cff-version: 1.2.0
+title: Choice-Learn
+message: >-
+  Large-scale choice modeling for operational contexts
+  through the lens of machine learning
+type: software
+authors:
+  - given-names: Vincent
+    family-names: Auriau
+    email: vincent.auriau@artefact.com
+    affiliation: CentraleSupélec
+    orcid: 'https://orcid.org/0009-0002-9640-2639'
+  - given-names: Ali
+    family-names: Aouad
+    orcid: 'https://orcid.org/0000-0002-9812-6140'
+    affiliation: London Business School
+  - given-names: Antoine
+    family-names: Désir
+    affiliation: INSEAD
+    orcid: 'https://orcid.org/0000-0001-5654-3301'
+  - given-names: Emmanuel
+    family-names: Malherbe
+    affiliation: Artefact Research Center
+    orcid: 'https://orcid.org/0009-0006-0898-6873'
+identifiers:
+  - type: doi
+    value: 10.21105/joss.06899
+repository-code: 'https://github.com/artefactory/choice-learn'
+url: 'https://artefactory.github.io/choice-learn/'
+abstract: >-
+  Choice-Learn provides a modular suite of choice modeling
+  tools for practitioners and academic researchers to
+  process choice data, and then formulate, estimate and
+  operationalize choice models.
+license: MIT

README.md

@@ -15,7 +15,8 @@
 ![PyPI - Version](https://img.shields.io/pypi/v/choice-learn)
 ![PyPI - License](https://img.shields.io/pypi/l/choice-learn)
 
-
+[![DOI](https://joss.theoj.org/papers/10.21105/joss.06899/status.svg)](https://doi.org/10.21105/joss.06899)
+[![cite](https://img.shields.io/badge/citation-00FFFF)](./CITATION.bib)
 </div>
 
 
@@ -185,7 +186,8 @@ print(model.report)
 ## :trident: Documentation
 
 A detailed documentation of this project is available [here](https://artefactory.github.io/choice-learn/).\
-TensorFlow also has extensive [documentation](https://www.tensorflow.org/) that can help you.
+TensorFlow also has extensive [documentation](https://www.tensorflow.org/) that can help you.\
+An academic paper has been published in the Journal of Open-Source Software, [here](https://joss.theoj.org/papers/10.21105/joss.06899).
 
 ## :trident: Contributing
 You are welcome to contribute to the project ! You can help in various ways:
@@ -200,7 +202,25 @@ We recommend to first open an [issue](https://github.com/artefactory/choice-lear
 
 ## :trident: Citation
 
-If you consider this package and any of its feature useful for your research, please cite us.
+If you consider this package and any of its feature useful for your research, consider citing our [paper](https://joss.theoj.org/papers/10.21105/joss.06899).
+
+<a href="https://joss.theoj.org/papers/10.21105/joss.06899">
+<img align="left" width="100"src="https://github.com/openjournals/joss/blob/main/docs/logos/joss-logo.png?raw=true" />
+</a>
+
+```bash
+@article{Auriau2024,
+  doi = {10.21105/joss.06899},
+  url = {https://doi.org/10.21105/joss.06899},
+  year = {2024},
+  publisher = {The Open Journal},
+  volume = {9},
+  number = {101},
+  pages = {6899},
+  author = {Vincent Auriau and Ali Aouad and Antoine Désir and Emmanuel Malherbe},
+  title = {Choice-Learn: Large-scale choice modeling for operational contexts through the lens of machine learning},
+  journal = {Journal of Open Source Software} }
+```
 
 ### License
 
@@ -262,10 +282,3 @@ Choice-Learn has been developed through a collaboration between researchers at t
 
 [1] [RUMnet](https://github.com/antoinedesir/rumnet)\
 [7] TasteNet [[Repo1](https://github.com/YafeiHan-MIT/TasteNet-MNL)] [[Repo2](https://github.com/deborahmit/TasteNet-MNL)]
-
-*Other choice modeling packages:*
-
-- [PyLogit](https://github.com/timothyb0912/pylogit)
-- [Torch Choice](https://gsbdbi.github.io/torch-choice)
-- [BioGeme](https://github.com/michelbierlaire/biogeme)
-- [mlogit](https://github.com/cran/mlogit)