changed to CITATION.cff

CITATION.cff

@@ -0,0 +1,15 @@
+cff-version: 1.2.0
+message: "If you use this software, please cite it as below."
+type: software
+authors:
+  - family-names: "Kenens"
+    given-names: "Antonin"
+title: "KrylovPreconditioners.jl : The ultimate collection of preconditioners "
+date-released: '2023-11-20'
+version: 0.2.2
+license: MPL-2.0
+repository-code: "https://github.com/JuliaSmoothOptimizers/KrylovPreconditioners.jl"
+keywords:
+  - Least squares
+  - Julia
+  - preconditioners

README.md

@@ -1,4 +1,4 @@
-# KrylovPreconditioners.jl
+# `KrylovPreconditioners`.jl
 
 | **Documentation** | **CI** | **Coverage** | **Downloads** |
 |:-----------------:|:------:|:------------:|:-------------:|
@@ -17,4 +17,8 @@
 [downloads-img]: https://shields.io/endpoint?url=https://pkgs.genieframework.com/api/v1/badge/KrylovPreconditioners
 [downloads-url]: https://pkgs.genieframework.com?packages=KrylovPreconditioners
 
+## How to Cite
+
+If you use KrylovPreconditioners.jl in your work, please cite using the format given in [`CITATION.cff`](https://github.com/JuliaSmoothOptimizers/KrylovPreconditioners.jl/blob/main/CITATION.cff).
+
 The best sidekick of [Krylov.jl](https://github.com/JuliaSmoothOptimizers/Krylov.jl) └(^o^ )Ｘ( ^o^)┘

docs/src/index.md

@@ -1,7 +1,9 @@
 # [KrylovPreconditioners.jl documentation](@id Home)
 
 This package provides a collection of preconditioners.
+## How to Cite
 
+If you use KrylovPreconditioners.jl in your work, please cite using the format given in [`CITATION.cff`](https://github.com/JuliaSmoothOptimizers/KrylovPreconditioners.jl/blob/main/CITATION.cff).
 ## How to Install
 
 KrylovPreconditioners.jl can be installed and tested through the Julia package manager: