Updated README and added citation

CITATION.cff

@@ -0,0 +1,24 @@
+cff-version: 1.2.0
+message: "If you use this software, please cite it as below."
+authors:
+- family-names: "Saavedra-Ruiz"
+  given-names: "Miguel"
+  orcid: "https://orcid.org/0000-0002-1599-4357"
+  website: "https://mikes96.github.io/"
+- family-names: "Pinto-Vargas"
+  given-names: "Ana Maria"
+  orcid: "https://orcid.org/0000-0000-0000-0000"
+- family-names: "Romero-Cano"
+  given-names: "Victor"
+  orcid: "https://orcid.org/0000-0003-2910-5116"
+title: "Monocular visual autonomous landing system for quadcopter drones using software in the loop"
+version: 1.0.0
+preferred-citation:
+  identifiers:
+    - type: other
+      value: "arXiv:2108.06616"
+      description: The ArXiv preprint of the paper
+type: software
+date-released: 2021-08-21
+license: MIT
+repository-code: "https://github.com/MikeS96/autonomous_landing_uav"

README.md

@@ -50,7 +50,7 @@ The repository containing the evaluation of this work can be found [here](https:
 
 ## Citation
 
-If you use this code, please cite our [paper](https://arxiv.org/abs/2108.06616):
+If you use this code, please cite our [paper](https://arxiv.org/abs/2108.06616) as:
 
 ```
 @misc{saavedraruiz2021monocular,