Não informado. (1980). European Journal of Combinatorics. Academic Press.
Lua i Stíl Chicago (17ú heag.)Não informado. European Journal of Combinatorics. London: Academic Press, 1980.
Lua MLA (8ú heag.)Não informado. European Journal of Combinatorics. Academic Press, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.