Seminar of Celestial Mechanics and Space Research & Universitatea Babes-Bolyai. Sectia de Matematica. (1980). Seminar of celestial mechanics and space research: Preprint. Babes-Bolyai University, Faculty of Mathematics.
Lua i Stíl Chicago (17ú heag.)Seminar of Celestial Mechanics and Space Research agus Universitatea Babes-Bolyai. Sectia de Matematica. Seminar of Celestial Mechanics and Space Research: Preprint. Cluj-Napoca: Babes-Bolyai University, Faculty of Mathematics, 1980.
Lua MLA (8ú heag.)Seminar of Celestial Mechanics and Space Research agus Universitatea Babes-Bolyai. Sectia de Matematica. Seminar of Celestial Mechanics and Space Research: Preprint. Babes-Bolyai University, Faculty of Mathematics, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.