Nj1990
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B. Najman. The nonrelativistic limit of the nonlinear Klein-Gordon equation. Nonlinear Anal, 15 (1990), 217-228. MathSciNet, arXiv.
B. Najman. The nonrelativistic limit of the nonlinear Klein-Gordon equation. Nonlinear Anal, 15 (1990), 217-228. MathSciNet, arXiv.