Let H(q 2) be the Hughes plane on the regular near field of order q2 whose center is a field of order q. We construct in H(q 2) a unital of parameter q.* Lavoro eseguito neU'ambito di attivit~t di dcerca finanziate dal M.P.I. (fondi 60% e 40%).Geometriae Dedicata 27 (1988) 295-299.

LUIGI ANTONIO ROSATI SUGLI INSIEMI DI PERMUTAZIONI STRETTAMENTE k-TRANSITIVI (k>/3)* Dedicato a Guido Zappa in occasione del suo 70 ° compleannoSUMMARY. Let G be a sharply 3-transitive permutation set on a finite set E of even cardinality and let 1 be in G. The following theorems are proved.

We introduce a procedure which 'transforms' a given incidence structure into another one, provided certain conditions are met.

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