How many backlinks am I allowed to have per article?

You are allowed one backlink per 350 words. All backlinks are rel="nofollow."

I am providing additional backlinks to prove my sources. What do I do if I have more than one backlink per 350 words?

If you would like to provide links to informative, non-promotional additional resources, you may list them below as references, citing in-text with a number (e.g., [1]).