Não informado. (1975). Houston Journal of Mathematics. University of Houston, Department of Mathematics.
Lua i Stíl Chicago (17ú heag.)Não informado. Houston Journal of Mathematics. Houston, Tex: University of Houston, Department of Mathematics, 1975.
Lua MLA (8ú heag.)Não informado. Houston Journal of Mathematics. University of Houston, Department of Mathematics, 1975.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.