I think it's in the Dover edition:https://www.amazon.com/Mazurkas-Poemes-Impromptus-Other-Pieces/dp/0486265552/ref=sr_1_5?s=books&ie=UTF8&qid=1352675954&sr=1-5&keywords=scriabinI actually own this, but don't have it to hand. I also don't know what it is reprinted from ("authoritative russian editions"), so may just be a duplicate of Belaieff Verlag.
wouldn't be a bad thing either way, just if i'm gonna throw some cash down for a pd score, i'd like to get as much value for it as possible, and for such a short work, the entry fee seemed pretty steep. still worth considering, will look at your link here in a bit thanks for the head's up!
Peters may have it in their Scriabin volumes. I've worked alot with the Peters Sonata volumes, and they are very helpful. I have seen some Könemann editions in used book stores. Not sure how much Scriabin they have published, but what I have seen is in line with the quality you would expect from them. Personally, I've got the three Dover Scriabin books. While there are notational errors, many of them are easily identifiable. For me, such engraving errors are only a minor inconvenience and nothing to dissuade me from using the Dover editions - a little analysis goes a long way.
gottschalk collection that i bought used, that one has been an amazing find., fyi i think it is out of print, i uploaded a pdf to my scribd if anyone is interested you can see and download of my profile if you're a member w dl privilages, if one is looking for a collection of his and sees this used on the cheap, very good buy, it's huge.