TY  - THES
A1  - Arworn, Srichan
A1  - Denecke, Klaus-Dieter
T1  - Sets of hypersubstitutions and set-solid varieties
Y1  - 1999
ER  - 
TY  - THES
A1  - Arworn, Srichan
T1  - Groupoids of hypersubstitutions and G-solid varieties
Y1  - 1999
CY  - Potsdam
ER  -