2 citations to https://www.mathnet.ru/eng/dan36222

1. A. I. Bashtanov, “Property of almost independent images for ergodic transformations without partial rigidity”, Proc. Steklov Inst. Math., 271 (2010), 23–33          
2. A. V. Safonov, “Information pasts in groups”, Math. USSR-Izv., 22:2 (1984), 393–398