Hi Amnah,
The appropriate publications will depend on the dataset you're looking at. If you've been looking at one of the default datasets, you can probably find the corresponding article here:
http://biogps.org/downloads/ (under publications/references).
If you've been inspecting one of the datasets in the library, click on the 'source' link next to the dataset to see its ArrayExpress entry and the appropriate citation.
If you just want to find articles on this gene in general, there are plugins which can help you do that.
best wishes,
ginger