Steve Ditko - IMDb
Steve Ditko: Spider-Man co-creator dies aged 90, US News
Steve Ditko's Vision of Eternity in Dr. Strange
Comic artist Steve Ditko, the co-creator of Spider-Man and Doctor Strange, has died - The Verge
Steve Ditko, Spider-Man co-creator, dies at age 90
Stephen Ditko, co-creator of Spider-Man and Doctor Strange, dead at 90
Steve Ditko, Marvel Database
Steve Ditko: Spider-Man co-creator found dead at 90 - BBC News
Steve Ditko, co-creator of Spider-Man and Doctor Strange, has died aged 90