Puhakka, P. (1974). Level structure of 157Tb from the decay of 157Dy. Dept. of Physics, University of Helsinki.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPuhakka, Pertti. Level Structure of 157Tb from the Decay of 157Dy. Helsinki: Dept. of Physics, University of Helsinki, 1974.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPuhakka, Pertti. Level Structure of 157Tb from the Decay of 157Dy. Dept. of Physics, University of Helsinki, 1974.
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