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Additional information
Joint Institute for Nuclear Research, Dubna. Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 19, No. 1, pp. 47–58, April, 1974.
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Barbashov, B.M., Nesterenko, V.V. Approximate solutions in the model ℒint = h2ψ2ϕ2 and equations for Green's functions on paths. Theor Math Phys 19, 340–348 (1974). https://doi.org/10.1007/BF01037190
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DOI: https://doi.org/10.1007/BF01037190