Classification of M2-brane 2-torus bundles, <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>U</mml:mi></mml:mrow></mml:math> -duality invariance, and type II gauged supergravities
Physical review. D/Physical review. D.