Volume 69, No. 4 (2012)
Portugaliae Mathematica

pp. 259–281 Construction of -ary -hypergroupsSaid M. AnvariyehBijan DavvazSaeed Mirvakili
pp. 283–303 On perfect polynomials over with irreducible factorsLuis H. GallardoOlivier Rahavandrainy
pp. 305–320 Class operators and quasisimilarityMohammad H. M. Rashid
pp. 321–339 Regularities and limit theorems of some additive functionals of symmetric stable process in some anisotropic Besov spacesAissa SghirHanae Ouahhabi
pp. 341–360 Krohn–Rhodes complexity of Brauer type semigroupsKarl Auinger