A referendum that happened after you sent the troops you mean? You invaded a country because you wanted it's territory. You have no right to enter a country without permission i.e invade
Neither did NATO when they invaded Yugoslavia, as well as tore away a core part of Serbia (Kosovo). Oh and, unlike NATO, Russians didn't kill a single soul in Crimea AND there was a referendum where the people got to decide if they wished to rejoin Russia or stay with Ukraine. This is something that was absent in Kosovo, yet in your mind somehow Kosovo becoming independent is more legitimate than Crimea re-joining Russia. Russian troops that were on guard in Crimea were simply ensuring that no provocations would come from the Ukrainian extremists who would most certaintly try their best to disrupt the referendum. The Russian troops were simply ensuring safety for everyone who was voting.
Also, the vote is very much legitimate. I have spoken to many people who live in Crimea, and they are all very happy that they have rejoined the Russian Federation. I also know people who have travelled to Crimea, and everyone is very much enjoying the fact that they have once again rejoined the Russian Federation. Of course, you won't believe me because you've been brainwashed too much, but I would invite you to go down to Crimea and see for yourself.
I would suggest you watch this documentary (Crimea. The way back home) to get a good understanding of how Crimea rejoined Russia. It has English subtitles, so you'll manage.
In regards to what you are saying to Gojkov, the results are not questionable at all. Crimea has a majority of Russians living on there, and it is and always has been Russian territory. The ONLY reason that Crimea was transferred to Ukraine back in 1954 was because Khrushchev was Ukrainian and he loved his homeland so much that he for some reason decided to transfer Crimea from the Russian SFSR to the Ukrainian SFSR. If you would like to, I can get you in contact with a Crimean guy, and he can explain to you why he voted to join Russia and how he didn't feel threatened by the Russian troops present in Crimea at all. Oh and, there have also been Western reporters that have been on the streets of Crimea, talking to the local populace and most of them are happy and content with being part of Russia again.