Wahl, N. (2001). Ribbon braids and related operads.
Lua i Stíl Chicago (17ú heag.)Wahl, N. Ribbon Braids and Related Operads. 2001.
Lua MLA (9ú heag.)Wahl, N. Ribbon Braids and Related Operads. 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.