Tsiolkovsky and Saturn missions

[VDD1991]

While browsing Wikipedia, I found out that Soviet Russia had plans for interplanetary spacecraft intended to explore Jupiter and Saturn.^1,2. Does anybody have additional info on the USSR's plans for unmanned exploration of Jupiter, Saturn, Uranus, Neptune, and Pluto?

¹ http://www.russianspaceweb.com/spacecraft_planetary_plans.html
² http://adsabs.harvard.edu/abs/1992wadc.iafcQY...R