The original novel mentions a character, who's never seen, by the name of Wilma who's catchphrase is "Just call me Billy." This is a clear reference to the character of Wilma in The Crate, a short story by Stephen King that was adapted by King as a segment of Creepshow also directed by George Romero.
In the prologue of this Stephen King adaptation, Thad Beaumont wants to become a writer and is shown writing stories. The title of his first typewritten story is "Here There Be Tygers", which is also the real title of the first short story King wrote in his career. The story can be found in King's "Skeleton Crew" anthology.