On the problem of basis for hyperquasivarieties
  In the paper we presnt a solution of problem 31 of chaptr 8 of the monograph of K. Denecke and S. L. Wismath: Hypridentities and clones, Gordon & Breach, 2000, by presnting two main theorems on hyperbasis for hypervarieties and hyperquasivarieties. 
Ewa Wanda Graczynska