Não informado. (1999). Mathematical Reviews. American Mathematical Society.
Lua i Stíl Chicago (17ú heag.)Não informado. Mathematical Reviews. Lancaster, Pa: American Mathematical Society, 1999.
Lua MLA (8ú heag.)Não informado. Mathematical Reviews. American Mathematical Society, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.