Im not entirely sure why you think this isnt significant  The whole crux of the disagreement was on independence for Lithuania and the antiSoviet leaders really didnt have the power to achieve that with anything but diplomacy and referenda again not saying that what they did was legal or illegal but pratically speaking  Im not sure about your biased and nationalistic books but a few seconds of searching brought me a New York Times front page article from  titled EVOLUTION IN EUROPE LITHUANIA AGREES TO SUSPEND LAWS ON INDEPENDENCE  I know about the rule regarding individual research but I did a term paper in college about this that Im going to try to dig up and use the bibliography  If I remember there was quite a bit on JSTOR so if youve got access to it you should check it out  I think its relevant to the recent UkraineRussia dispute because it shows the significant power that RussiaUSSR can wield with the threat of an energy embargo