Ritt J.F. Integration in Finite Terms: Liouville’S Theory of Elementary Methods

Columbia University Press, 2019. — 112 p.Gives an account of Liouville's theory of integration in finite terms -- his determination of the form which the integral of an algebraic function must have when the integral can be expressed with the operations of elementary mathematical analysis, carried out a finite number of times -- and the work of some of his followers.