HUMBERT

Potentiels et prépotentiels (Cahiers scientifiques, Paris, 1956).

— Fonctions de Mathieu, de Lamé (Mémorial Sc. Math., fasc. 10, 1932). Mathieu Functions of higher order (Proc. Ed. Math. Soc., t. 40, 1922. p. 27).

INcE (L.):

Associated Mathieu functions (Proc. Ed. Math. Soc, t. 4, 1923, p. 94).

Linear differential equation with periodic coefficients (Proc. London. Math. Soc., t. 23, 1923, p- 56).

Charactéristic numbers of Mathieu équation (Proc. Roy. Soc. Edimburg, t. 46, 1925, p. 20; t. 46, 1926, p. 316; t. 47, 1927, p. 294).

Tables of the crane cylinder functions (Proc. Roy. Soc. Edinburg, t. 52, 1932, p. ue

Mathieu functions of stable type (Phil. Mag., t. 6, 1928, p. 547).

Mathiews equations with large parameters (Journ. London Math. Soc., t. 2, 1926, p. 46).

Relations between the elliptic cylinder functions (Proc. Roy. Soc. wof. Ed., t.59, 1939, p. 156).

Mac LACHLAN :

Theory and application of Mathieu functions, Oxford, 1947.