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Lua i Stíl Chicago (17ú heag.)Puhakka, Pertti. Level Structure of 157Tb from the Decay of 157Dy. Helsinki: Dept. of Physics, University of Helsinki, 1974.
Lua MLA (8ú heag.)Puhakka, Pertti. Level Structure of 157Tb from the Decay of 157Dy. Dept. of Physics, University of Helsinki, 1974.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.