Flatness Properties of Monocyclic Acts.
Flatness and projectivity in commutative regular semigroups.
Flatness in varieties of normal bands.
Representation extension properties of normal bands.
A non regular perfect semigroup.
A characterization of left cancellative monoids by flatness properties.
Monoids over which all flat cyclic right acts are strongly flat.
Products of Idempotent Endomorphisms of Free Acts of Infinite Rank.
On left absolutely flat monoids.
Flatness and amalgamation in semigroups.
Some observations on left absolutely flat monoids.
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