ZhETF, Vol. 36,
No. 6,
p. 1839 (December 1959)
(English translation - JETP,
Vol. 9,
No. 6,
p. 1312,
December 1959
)
The issue content is only available in english translation.
Three-Photon Annihilation of Positronium in the P State
A.I. Alekseev
Received: December 27, 1958
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