ZhETF, Vol. 47,
No. 1,
p. 221 (January 1965)
(English translation - JETP,
Vol. 20,
No. 1,
p. 149,
January 1965
)
The issue content is only available in english translation.
On the Choice of Invariant Variables for the Amplitudes of Particle Production Processes
A. Frenkel
Received: January 8, 1964
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