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- [22] ON LINEAR-SYSTEMS OF ORDINARY DIFFERENTIAL-EQUATIONS DOKLADY AKADEMII NAUK SSSR, 1982, 266 (02): : 299 - 301
- [24] GROUP-ANALYSIS OF A SYSTEM OF NON-LINEAR DIFFERENTIAL-EQUATIONS EQUIVALENT TO THE SCHRODINGER-EQUATION UKRAINSKII FIZICHESKII ZHURNAL, 1981, 26 (02): : 323 - 326