The Order of Generalized Hypersubstitutions of Type τ=(2). - Wattapong Puninagool; Sorasak Leeratanavalee (Int. J. Math. Math. Sci., 2008)

Complexity of terms, superpositions, and generalized hypersubstitutions. - Wattapong Puninagool; Sorasak Leeratanavalee (Comput. Math. Appl., 2010)