Leivo, M. (1995). High early strength concrete. Helsinki University of Technology.
Lua i Stíl Chicago (17ú heag.)Leivo, Markku. High Early Strength Concrete. Espoo: Helsinki University of Technology, 1995.
Lua MLA (8ú heag.)Leivo, Markku. High Early Strength Concrete. Helsinki University of Technology, 1995.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.