Alternatively, the user might have misspelled the names or the title. Maybe it's "Gabriel Kuhn and Daniel B. Perry" or a similar variation. Let me check if there's a known collaboration between these two. A quick search shows that Gabriel Kuhn has co-authored works with others, but Daniel Perry isn't listed as a known co-author. This could be a case of a user mistyping or misunderstanding the sources they are referring to.