Gottlob, G., Leone, N., & Veith, H. (1995). Second Order Logic and the Weak Exponential Hierarchies. Springer.
Lua i Stíl Chicago (17ú heag.)Gottlob, G., N. Leone, agus H. Veith. Second Order Logic and the Weak Exponential Hierarchies. Springer, 1995.
Lua MLA (9ú heag.)Gottlob, G., et al. Second Order Logic and the Weak Exponential Hierarchies. Springer, 1995.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.