The phrase "to establish that publication" means to prove or confirm that a work or piece of writing has been created and made available to the public.
Sentences with «to establish that publication»
Some of the more established publications could take lessons. (slaw.ca)
The editorial calendar will help us select the best content to our audience and establish the publication deadlines. (neliosoftware.com)
They need to come from reputable sources, such as online legal directories and established publications where your name appears. (lawyermarketing.com)