Permutable transformation semigroups.
Permutation properties and the Fibonacci semigroup.
Polars and X-ideals in semigroups
Polynomial functions over commutative semigroups.
Positive functions from -indecomposable semigroups into partially ordered sets
Positive rational semigroups and commutative power joined cancellative semigroups without idempotent
Power cancellative semigroups.
Power series developments in lattice ordered semigroups.
Powers of subsets in a finite semigroup.
Poznámka k maximálnym ()-ideálom v pologrupách
Precomplete varieties of semigroups.
P-regular semigroups.
Primary factorization in semigroups
Primary ideals in semigroups.
Primary semigroups.
Prime ideals in a semigroup of measures
Primitive orthodox semigroups.
Product of idempotents in finite full transformation semigroups.
Products of four idempotents in finite full transformation semigroups.
Products of inverse semigroups.