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Vilnius Pedagogical University, Studentu 39, 2034 Vilnius, Lithuania. Translated from Lietuvos Matematikos Rinkinys, Vol. 38, No. 2, pp. 276–291, April–June, 1998.
Translated by R. Lapinskas
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Vosylius, R. On the intrinsic connections of systems of differential equations in partial derivatives. I. Lith Math J 38, 213–223 (1998). https://doi.org/10.1007/BF02465558
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DOI: https://doi.org/10.1007/BF02465558