aspell - how to ignore references inside \citep{} and \citet{} references [closed]

Question

I'm using aspell --version International Ispell Version 3.1.20 (but really Aspell 0.60.6) to verify my tex files with the command:

    aspell -d pt_PT --dont-tex-check-comments  -c file0.tex

The problem is that ispell checks inside each

    \citep{someone2011sometitle} 

and each

    \citet{someone2011sometitle}

that I'm using with

    \usepackage[authoryear]{natbib}

What can I do for ispell to ignore the references?