Relative completeness with respect to two unary functions. - Jovanka Pantovic; Ratko Tosic; Gradimir Vojvodic (Discret. Appl. Math., 2001)

Minimal Partial Hyperclones on a Two-Element Set. - Jovanka Pantovic; Gradimir Vojvodic (ISMVL, 2004)

On the Partial Hyperclone Lattice. - Jovanka Pantovic; Gradimir Vojvodic (ISMVL, 2005)

Commuting Hyperoperations. - Jovanka Pantovic; Gradimir Vojvodic (ISMVL, 2006)

Unary Minimal Partial Hyperclones. - Jovanka Pantovic; Biljana Rodic; Gradimir Vojvodic (J. Multiple Valued Log. Soft Comput., 2006)