Tarisa ndima iri pasi apa uye wozopindura mubvunzo unotevera mumutauro mumwechete sezvinoita ndima: Passage: panguva imwecheteyo yakakurudzira kuwedzera kwakafanana, uye saka muenzaniso unozivikanwa sePolyakov-Kleinert tambo. Mubvunzo: Chii chaive zita remhando yekupedzisira?
Polyakov-Kleinert tambo