TY - JOUR AU - Batbedat, A. TI - Algebras, prerings, semirings and rectangular bands. JO - Semigroup forum PY - 1984 VL - 30 SP - 231 EP - 233 KW - prerings; semirings; rectangular bands; algebras; rectangular product UR - http://eudml.org/doc/134718 ER -