K. Denecke and W. Supaporn, Weak homomorphisms for (F1; F2)-systems, Proceedings of IndoMS International Conference on Mathematics and Its Applications, Yogyakarta, Indonesia, October 12-13, 2009, 35-51.
W. Supaporn, Centralizer clones are preserved by category equivalences, Demonstratio Mathematica, Vol. 44(4), 2011. 819-822.
J. Koppitz and W. Supaporn, Category Equivalences of clones of operations preserving unary relations, Comptes rendus de lAcade'mie bulgare des Sciences, 66(2), 2013, 177-184.