Thawhat Changphas. 2004. Monoids of hypersubstitutions. , Potsdam University;
Thawhat Changphas. (2004) Monoids of hypersubstitutions . Potsdam University/Potsdam.
Thawhat Changphas. Monoids of hypersubstitutions. . Potsdam:Potsdam University, 2004.
Thawhat Changphas. (2004) Monoids of hypersubstitutions . Potsdam University/Potsdam.