Summary
The Ukrainian government has produced no evidence of the presence of Russian army forces in Eastern Ukraine.
Disproof
There is plenty of evidence of the presence of Russian soldiers in Ukraine euvsdisinfo.eu/ukraine-revisited/, , www.businessinsider.com/r-special-report-russian-fighters-caught-in-ukraine-cast-adrift-by-moscow-2015-5, , www.nytimes.com/2015/05/19/world/europe/ukraine-captured-two-russian-soldiers.html, , www.bbc.com/news/world-europe-28934213,