Lévai, Z. (1966). Theory of epicyclic gears and epicyclic change-speed gears.
Lua i Stíl Chicago (17ú heag.)Lévai, Zoltán. Theory of Epicyclic Gears and Epicyclic Change-speed Gears. Budapest, 1966.
Lua MLA (8ú heag.)Lévai, Zoltán. Theory of Epicyclic Gears and Epicyclic Change-speed Gears. 1966.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.