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• Tryhuk, Václav: On global transformations of functional-differential equations of the first order. (English). Czechoslovak Mathematical Journal, vol. 50 (2000), issue 2, pp. 279-293
• Tryhuk, Václav: On global transformations of ordinary differential equations of the second order. (English). Czechoslovak Mathematical Journal, vol. 50 (2000), issue 3, pp. 499-508
• Tryhuk, Václav: On transformations $z(t)=y(\varphi(t))$ of ordinary differential equations. (English). Czechoslovak Mathematical Journal, vol. 50 (2000), issue 3, pp. 509-518
• Tryhuk, Václav: Transformations $z(t)=L(t)y(\varphi(t))$ of ordinary differential equations. (English). Czechoslovak Mathematical Journal, vol. 50 (2000), issue 3, pp. 519-529
• Parkash, Om; Singh, R. S.: On characterization of useful information-theoretic measures. (English). Kybernetika, vol. 23 (1987), issue 3, pp. 245-251
• Sharma, Bhu Dev; Singh, R. P.: A generalization of entropy equation: homogeneous entropies. (English). Kybernetika, vol. 21 (1985), issue 2, pp. 157-163
• Kannappan, PL.: On a multiplace functional equation related to information measures and functions. (English). Kybernetika, vol. 19 (1983), issue 2, pp. 110-120
• Kannappan, PL.: On some functional equations from additive and nonadditive measures. IV. (English). Kybernetika, vol. 17 (1981), issue 5, pp. 394-400
• Kannappan, PL.; Rathie, P. N.: Generalization of sum representation functional equations. II: Generalized directed divergence. (English). Kybernetika, vol. 15 (1979), issue 1, pp. (28)-39