1. On a construction of codes by P-fuzzy sets;Šešelja;Review of Res. Fac. Sci Univ. Novi Sad,1990
2. Fuzzy sets on S as a closure operations on ¢P(S);Šešelja;Review of Research Fac. Sci. Univ. Novi Sad,1984
3. L-fuzzy sets and codes;Šešelja;Fuzzy Sets and Systems,1993