Update index.md

docs/src/index.md

@@ -4,7 +4,7 @@ Welcome to the documentation for `GridapTopOpt.jl`!
 ## Introduction
 `GridapTopOpt.jl` is computational toolbox for level set-based topology optimisation implemented in Julia and the Gridap package ecosystem. The core design principle of `GridapTopOpt.jl` is to provide an extendable framework for solving optimisation problems in serial or parallel with a high-level programming interface and automatic differentiation. See the following publication for further details:
 
-> Zachary J. Wegert, Jordi Manyer, Connor Mallon, Santiago Badia, and Vivien J. Challis (2024). "GridapTopOpt.jl: A scalable computational toolbox for level set-based topology optimisation". In preparation.
+> Zachary J. Wegert, Jordi Manyer, Connor Mallon, Santiago Badia, and Vivien J. Challis (2024). "GridapTopOpt.jl: A scalable Julia toolbox for level set-based topology optimisation". [arXiv:2405.10478](https://arxiv.org/abs/2405.10478).
 
 ## How to use this documentation
 
@@ -21,4 +21,4 @@ Here, one can find a list of resources to get started with this programming lang
 
 * First steps to learn Julia form the [Gridap wiki](https://github.com/gridap/Gridap.jl/wiki/Start-learning-Julia) page.
 * Official webpage [docs.julialang.org](https://docs.julialang.org/)
-* Official list of learning resources [julialang.org/learning](https://julialang.org/learning/)
+* Official list of learning resources [julialang.org/learning](https://julialang.org/learning/)