On a test for codes. Falucskai, J. — 2006 Acta Mathematica Academiae Paedagogicae Nyí regyháziensis. New Series [electronic only]
On equivalence of two tests for codes. Falucskai, J. — 2008 Acta Mathematica Academiae Paedagogicae Nyí regyháziensis. New Series [electronic only]