What Is a Relay and How Does it Work? (in en). thegraduateengineer.com (2021-11-23). Retrieved on 2021-11-29.web.archives.org
Relay and Starter (in en). bartleby.com. Retrieved on 2022-01-22.web.archives.org
Взлом Английского (2022-09-05). Новый День Новое Слово. День №253. #shorts #шорты (in ru). youtube.com. Retrieved on 2023-04-09.Min 0:06, web.archives.org
Terry Day (2023-06-17). Interlocking Reduced Frightening Mistakes, Protected People, and Assets (in en). medium.com. Retrieved on 2023-11-17.archive.ph
Studytiger - Physik & E-Technik (2023-11-19). SPULE – (Gleichspannung vs. Wechselspannung) | Strom & Spannung (in de). youtube.com. Retrieved on 2023-12-14.Teaser image, web.archive.org
Micro History (2024-04-22). Micro History Episode 0 (in en). youtube.com. Retrieved on 2024-05-06.Min 5:26, web.archive.org
電子回路の「アイソレーション」を考える (in ja). monoist.itmedia.co.jp (2024-05-29). Retrieved on 2024-06-08.web.archive.org