Agarwal, Ravi P. Difference equations and inequalities : Theory, methods and applications / by Ravi P. Agarwal - New York: Marcel Dekker Inc., 1992. - xiii, 777p. - Pure and applied mathematics . ISBN: 0824786769 Subjects--Topical Terms: Difference equationsInequalitiesMathPreliminaries Dewey Class. No.: 515.625 / AGA/D