Periodic differential equations : an introduction to Mathieu, Lamé, and allied functions / F.M. Arscott. Arscott, F. M. Differential equations. Harmonic functions. QA371 .A7 1964a 517.38 ARP Includes bibliographical references and index. Oxford : New York, Pergamon Press, 1964. 1964. 1964 Text x, 283 p. : eng International series of monographs in pure and applied mathematics ; v. 66