1. On regular and regularised varieties

   • Anna Romanowska

   OriginalPaper Pages: 215 - 241

2. On the width of ordered sets and Boolean algebras

   • E. C. Milner
   • M. Pouzet

   OriginalPaper Pages: 242 - 253

3. On the definability of P_s(A)

   • John T. Baldwin
   • Marouf A. Samhan

   OriginalPaper Pages: 254 - 261

4. The class of Kleene algebras satisfying an interpolation property and Nelson algebras

   • Roberto Cignoli

   OriginalPaper Pages: 262 - 292

5. Almost equational classes of algebras

   • Ivan Žembery

   OriginalPaper Pages: 293 - 307

6. On the minimal extension of sequences

   • J. Dudek

   OriginalPaper Pages: 308 - 312

7. On idempotent algebras with\(p_n (\mathfrak{A}) = 2n\)

   • Andrzej Kisielewicz

   OriginalPaper Pages: 313 - 323