1. Normalintegrale auf offenen Riemannschen Flächen;Ahlfors, Lars V.;Ann. Acad. Sci. Fennicae Ser. A. I. Math.-Phys.,1947
2. The method of orthogonal decomposition for differentials on open Riemann surfaces;Ahlfors, Lars V.;Ann. Acad. Sci. Fenn. Ser. A. I, no.,1958
3. The theory of square integrable differentials on open Riemann surfaces, Report to the Mathematics Division, Air Force Office of Scientific Research, ARDC, Washington 25, D. C., AFOSR Report Number TN 57 790, January 1958.
4. Bases in Banach spaces;Karlin, S.;Duke Math. J.,1948
5. On Riemann’s period relations on open Riemann surfaces;Kusunoki, Yukio;Mem. Coll. Sci. Univ. Kyoto Ser. A. Math.,1956