中国科学院数学与系统科学研究院期刊网
AMS
Twisted Semigroup Crossed Products and Twisted Toeplitz Algebras of Ordered Groups
Sriwulan ADJI, Rizky ROSJANUARDI
Acta Mathematica Sinica . 2007, (9): 1639 -1648 .  DOI: 10.1007/s10114-005-0907-8