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Translated f rom Ukrainskii Matematicheskii Zhurnal, Vol. 41, No. 12, pp.1687–1694, December, 1989.
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Fushchich, V.I., Cherniga, R.M. Galilei invariant nonlinear equations of Schrödinger type and their exact solutions. II. Ukr Math J 41, 1456–1463 (1989). https://doi.org/10.1007/BF01056116
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DOI: https://doi.org/10.1007/BF01056116