Não informado. (1969). Bulletin of the London Mathematical Society. London Mathematical Society.
Lua i Stíl Chicago (17ú heag.)Não informado. Bulletin of the London Mathematical Society. London: London Mathematical Society, 1969.
Lua MLA (8ú heag.)Não informado. Bulletin of the London Mathematical Society. London Mathematical Society, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.