Yes, supplementary substance can be included in analysis papers to offer added facts or context. secondary - getting of 2nd rank or relevance or price; not direct or speedy; "the stone will likely be hauled to some secondary crusher"; "a secondary supply"; "a secondary concern"; "secondary streams" synonyms: auxiliary, subsidiary, https://bangkokwax39145.bloguerosa.com/31167866/the-fact-about-supplementary-that-no-one-is-suggesting