be obstinate

References in classic literature ?
For Heaven's sake don't be obstinate, for when others are obstinate I am obstinate likewise, and then I become ferocious and headstrong, and there's my friend, who is even more headstrong and ferocious than myself.
But in any case, an expensive and necessary operation cannot suffer because we decided to be obstinate on the field.
THE French can be obstinate about their wine, as you can see from their complicated labelling laws that they refuse to change, and now they are marshalling green arguments to raise the pitch for corks, which have been making way for screwcaps around the world.
I'm sure the boss doesn't intend to be obstinate, but he is right at retirement age .