Can we have two files with the same format (like PDF) for one book entry?

Hello,

I have a library with books in multiple formats (PDF, docx, ePub), and for one format (PDF), books are presented with different dimensions (content is the same).

Is there a way that one book entry in Calibre may link to few PDFs? It seems that one and only one format per book entry is allowed.

Thank you for your contribution