1. The third iterate of the Laplace transform;Akutowicz, Edwin J.;Duke Math. J.,1948
2. L. Bieberbach, Lehrbuch der Funktionentheorie, Leipzig, 1931.
3. Asymptotic relations for derivatives;Boas, R. P., Jr.;Duke Math. J.,1937
4. Inversion of a generalized Laplace integral;Boas, R. P., Jr.;Proc. Nat. Acad. Sci. U.S.A.,1942
5. The iterated Stieltjes transform;Boas, R. P., Jr.;Trans. Amer. Math. Soc.,1939