Polynome und algebraische Gleichungen über universalen Algebren.
Polynomial Interpolation and the Chinese Remainder Theorem for Algebraic Systems.
Polynomial Interpolation for Locally Equational Classes.
Positively conditional pseudovarieties and implicit operations on them.
Precomplete varieties of semigroups.
Primitive classes of algebras with two unary idempotent operations, containing all algebraic categories as full subcategories
Principal tolerances on lattices
Proper hypersubstitutions of some generalizations of lattices and Boolean algebras
Proprietà metamatematiche di alcune classi di algebre