What is the antonym of "interdisciplinary"? I want to say that articles related to particular related major or specializations are accepted as well as inter-disciplinary articles.
I don't think there is an actual antonym to "interdisciplinary", but it comes from "discipline" which designates a single discipline (when the singular is used), so you can use that.
I guess you could say
articles related to a particular discipline are accepted as well as inter-disciplinary articles.'
You could use "any discipline" as well but it's less precise and might not be suited if you want to specify that it is "a particular" discipline.