I would recommend papers by Susan Brison for the censorship case (and an argument as to why she thinks the First Amendment is baseless), and Rae Langton's case

I would recommend papers by Susan Brison for the censorship case (and an argument as to why she thinks the First Amendment is baseless), and Rae Langton's case for why pro-free speech liberals can (or even should) support a restriction on hate speech and pornography, based on their own principles.