Keimel, K. (1992). Ordered cones and approximation. Springer-Verlag.
Lua i Stíl Chicago (17ú heag.)Keimel, Klaus. Ordered Cones and Approximation. Berlin: Springer-Verlag, 1992.
Lua MLA (9ú heag.)Keimel, Klaus. Ordered Cones and Approximation. Springer-Verlag, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.