GROUP ANALYSIS OF SOME ORDINARY DIFFERENTIAL EQUATIONS
In: Proceedings of the Academy of Sciences of the Estonian SSR. Physics. Mathematics, Volume 35, Issue 1, p. 1
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In: Proceedings of the Academy of Sciences of the Estonian SSR. Physics. Mathematics, Volume 35, Issue 1, p. 1
In: Proceedings of the Estonian Academy of Sciences. Physics, mathematics, Volume 47, Issue 2, p. 110
In: Proceedings of the Academy of Sciences of the Estonian SSR. Physics. Mathematics, Volume 38, Issue 2, p. 180
In: Proceedings of the Academy of Sciences of the Estonian SSR. Physics. Mathematics, Volume 38, Issue 3, p. 294
In: Proceedings of the Academy of Sciences of the Estonian SSR. Physics. Mathematics, Volume 36, Issue 4, p. 431
In: Proceedings of the Academy of Sciences of the Estonian SSR. Physics. Mathematics, Volume 31, Issue 3, p. 304
In: Proceedings of the Academy of Sciences of the Estonian SSR. Physics. Mathematics, Volume 27, Issue 4, p. 453