Shuman, V. “On Prognostication Ability of Active Geosystems: Metastability and Steady Transitions Instead of Attractors”. Geofizicheskiy Zhurnal, vol. 38, no. 6, Dec. 2016, pp. 3-24, doi:10.24028/gzh.0203-3100.v38i6.2016.91469.