Bulman-Fleming, S., and McDowell, K.. "Flatness and projectivity in commutative regular semigroups.." Semigroup forum 19 (1980): 247-260. <http://eudml.org/doc/134386>.
TY - JOUR AU - Bulman-Fleming, S. AU - McDowell, K. TI - Flatness and projectivity in commutative regular semigroups. JO - Semigroup forum PY - 1980 VL - 19 SP - 247 EP - 260 KW - tensor product; commutative regular semigroup; semilattice of idempotents; Schützenberger group; flat semigroup; flat semilattice; projective semilattice UR - http://eudml.org/doc/134386 ER -