It seems like you're looking for a specific paper by Tony and Bell regarding pair productions, particularly focusing on trident pair production and nonlinear Breit-Wheeler pair production. Unfortunately, I can't provide direct access to papers or external content. However, I can suggest a few steps to help you find it:
1. University Library: Check your university's library database. Many academic institutions have subscriptions to journals where such papers might be published.
2. Google Scholar: Use Google Scholar to search for the paper. You can enter keywords like "trident pair production" and "nonlinear Breit-Wheeler pair production" along with the authors' names.
3. ResearchGate: Sometimes authors upload their papers on ResearchGate. You can search for the authors there and see if they have shared the paper.
4. Contact the Authors: If you still can't find it, consider reaching out to the authors directly via email. They might be willing to share a copy of their work with you.
If you have any specific questions about the concepts mentioned in the paper, feel free to ask!