Induced isomorphisms of certain ternary semigroups Antoni Chronowski, Miroslav Novotný (1995) Archivum Mathematicum
Isomorphism of projective planes and isotopism of planar ternary rings Pavel Burda (1977) Časopis pro pěstování matematiky
Isotopic invariants of natural planar ternary rings Dalibor Klucký (1995) Mathematica Bohemica In the paper the invariant (geometrical) character of some properties of natural planar ternary rings is shown by using isotopic transformations.