%0 Journal Article %T Halphen pencils on quartic threefolds %A Ivan Cheltsov %A Ilya Karzhemanov %J Mathematics %D 2008 %I arXiv %X For every smooth quartic threefold, we classify all pencils on it whose general element is an irreducible surface birational to a smooth surface of Kodaira dimension zero. %U http://arxiv.org/abs/0802.1049v4