William Shakespeare, Thomas Bowdler (1850). “The Family Shakspeare, in One Volume: In which Nothing is Added to the Original Text, But Those Words and Expressions are Omitted which Cannot with Propriety be Read in a Family”, p.217
Sir Isaac Newton (1962). “Sir Isaac Newton's Mathematical Principles of Natural Philosophy and His System of the World: The system of the world”, p.398, Univ of California Press