Jager, W., Rost, H., & Taute, P. (1980). Biological growth and spread. Springer-Verlag.
Lua i Stíl Chicago (17ú heag.)Jager, Willi, Hermann Rost, agus Petre Taute. Biological Growth and Spread. Berlín: Springer-Verlag, 1980.
Lua MLA (9ú heag.)Jager, Willi, et al. Biological Growth and Spread. Springer-Verlag, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.