Nkebi ahịrịokwu nke 1: Ndị ọzọ so dee ya bụ Arthur Bisguier (1953), Petar Trifunovic (1957), na Walter Korn (1963). Nkebi ahịrịokwu nke 2: Ndị ọzọ mechara nye onyinye gụnyere Arthur Bisguier (n'afọ 1953), Petar Trifunovic (n'afọ 1957), na Walter Korn (n'afọ 1963). Ajụjụ: Ọ̀ bụ otu ihe ka ahịrịokwu nke mbụ na nke abụọ pụtara? Ee ma ọ bụ Ee e?
Ee e