As someone with an advanced qualification in the Dutch language, I just wanted to add a comment. If we were to use it, I would translate this sentence from the interview differently. But I don't see the point in using in. In the years before 2000, when the interview seems to have happened, it clearly was the case that he was often published in learned journals. As such, that sentence does not help us to understand his academic career. I don't see what it adds to the section.