Não informado. (1922). Journal of Mathematics and Physics. Massachusetts Institute of Technology.
Lua i Stíl Chicago (17ú heag.)Não informado. Journal of Mathematics and Physics. Cambridge, Mass: Massachusetts Institute of Technology, 1922.
Lua MLA (8ú heag.)Não informado. Journal of Mathematics and Physics. Massachusetts Institute of Technology, 1922.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.