Geodesic
On a~Functional Equation with a~Group Isotopy Property
Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica, no. 2 (2005), pp. 65-71.

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The set of all solutions of functional equation F1(F2(z;x);F3(y;z))=F4(F5(x;y);x) on quasigroup operations of an arbitrary fixed set are found. The result implies W. Dudek's theorem [1], which presents the operation in a quasigroup satisfying the identity xy⋅x=zx⋅yz. 
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Raisa Koval'. On a~Functional Equation with a~Group Isotopy Property. Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica, no. 2 (2005), pp. 65-71. https://geodesic-test.mathdoc.fr/item/BASM_2005_2_a3/

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