From the statement:
"...we are not alone in this confrontation with Russia. In 1994 Ukraine signed the Budapest Memorandum with the U.S., UK and Russia guaranteeing our security in exchange for giving up our nuclear arsenal. Russia today is flagrantly violating its obligations and invading our territory. But I'm confident that the United States and Great Britain will never violate this Memorandum and will do everything they can to ensure peace in Ukraine. Vladimir Putin knows that by declaring war on us, he is declaring war on the guarantors of our security - the U.S. and Great Britain. I don't think that Russia will cross this line, because if it does it will lose.
"This should be the main reason for calm in our country."