Description of Weak Periodic Ground States of Ising Model with Competing   Interactions on Cayley Tree
  Recently by Rozikov an Ising model with competing interactions and spin values $\pm 1$, on a Cayley tree of order $k\geq 1$ has been considered and the ground states of the model are described. In this paper we describe some weak periodic ground states of the model. 
M.M.Rahmatullaev