滝沢 清

Some E^*-separating extension of regular semigroups 

Proceedings of the 4th symposium on semigroups 1980年  

Orthodox semigroups and E-unitary regular semigroups 

Bulletin of Tokyo Gakugei University 31 41-43 1979年  

E-unitary regular semigroups 

Proceedings of the third symposium on semigroups 1979年  

E-unitary R-unipotent semigroups 

Bulletin of Tokyo Gakugei University 30 21-33 1978年  

Note on {O_α}-bands of goupoids 

Semigroup Forum 9 155-158 1974年