Here's Why DC and Marvel Fought Over Captain Marvel
Captain Marvel (DC Comics) - Wikipedia
Why Marvel has a Captain Marvel but DC has a Captain Marvel called Shazam | GamesRadar+
Captain Marvel (DC Comics) | Superhero Wiki | Fandom
DC and Marvel both have a Captain Marvel, what's the story there? What big differences are there between Superman and Shazam? | Ask the DC Multiverse Historian
Adventures of Captain Marvel (1941 Serial) | DC Database | Fandom