You better start adding fairies, elves, bigfoot, the loch ness monster, witches, werewolves, etc. to your list of phenomena then. All have eyewitness accounts, published books, research papers (of a sort), and long documented histories. I don't believe any of them are true, do you?

BTW, what type of "research papers" are you talking about? How many actually appear in scientific journals. It is easy to write about "landing traces" or "alien implants" in the "Journal for scientific exploration". However, what about actual scientific journals that don't cater to wild "alien" ideas and demand a bit more from their articles. After all, they are journals for professionals and would like to have professionally written articles that intrigue and inform those reading the article. How many "research papers" have actually appeared in such journals?