On a class of functional equations.
A Remark on the Square Norm
Remarks on the Square Norm (Short Communication)
Report of Meeting: Das dritte internationale Kolloquium über Funktionalgleichungen in Miskolc, 13-16 September, 1970
On A Class Of Functional Equations
A generalization of the functional equation of bisymmetry
On some functional equations and on their classification
On concomitants of mixed tensors
Normenquadrat Über Gruppen
Some problems on ternary quasigroups
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