A system of nonlinear differential equations with an exact solution
English version (Springer): Ukrainian Mathematical Journal 31 (1979), no. 5, pp 457-462.
Citation Example: Prykarpatsky A. K. A system of nonlinear differential equations with an exact solution // Ukr. Mat. Zh. - 1979. - 31, № 5. - pp. 576–582.
Full text