Erich Klement, Radko Mesiar, Endre Pap,
"Transformations of copulas and quasi-copulas"
, in M. Lopéz-Díaz, M. Á. Gil, P. Grzegorzzewski, O. Hryniewicz, J. Lawry: Soft Methodology and Random Information Systems, Serie Advances in Soft Computing, Springer, Berlin-Heidelberg-New York, Seite(n) 181-188, 2004, ISBN: 3-540-22264-2