共 49 条
[1]
Aizenstat AYa, 1962, Sibirskii Matematiceskii Zurnal, V3, P161
[6]
Almeida J, 2000, TRENDS MATH, P1
[7]
Almeida J., 2001, PORT MATH, V58, P379
[8]
ALMEIDA J, IN PRESS INT J ALGEB
[9]
Almeida J., 1999, PORT MATH, V56, P409
[10]
[Anonymous], 1979, SEMIGROUPS COMBINATO