%0 Journal Article %A O. Sh. Karshiboev %T Periodic Gibbs measures for the three-state SOS model on a Cayley tree with a translation-invariant external field %J Teoretičeskaâ i matematičeskaâ fizika %D 2022 %P 448-456 %V 212 %N 3 %U http://geodesic.mathdoc.fr/item/TMF_2022_212_3_a8/ %G ru %F TMF_2022_212_3_a8