Sources for Episode Twenty Five of First Years

Dockterman, Eliana. Breaking Down How Time Travel Works in Avengers: Endgame. 26 Apr. 2019, time.com/5576656/avengers-endgame-time-travel/.

Elvy, Craig. The Umbrella Academy: Time Travel Rules Explained. 16 Aug. 2020, screenrant.com/umbrella-academy-time-travel-rules-paradox-explained/.

Thoman, Lauren. The Three Types of Time Travel Stories. 17 Nov. 2017, www.quirkbooks.com/post/three-types-time-travel-stories.