VISION OF GABRIEL UPDATE: Earlier I noted Israel Knohl's English article "'By Three Days, Live': Messiahs, Resurrection, and Ascent to Heaven in Hazon Gabriel" in the Journal of Religion, accessible only by subscription. Now Professor Knohl has posted it for free at the website of the Shalom Hartman Institute.
UPDATE: The link has gone dead. I've e-mailed Professor Knohl and will keep you posted.
UPDATE (18 May): Problem fixed.