@article{v008a001,
 author = {Dieter van Melkebeek and Thomas Watson},
 title = {Time-Space Efficient Simulations of Quantum Computations},
 year = {2012},
 pages = {1-51},
 doi = {10.4086/toc.2012.v008a001},
 publisher = {Theory of Computing},
 journal = {Theory of Computing},
 volume = {8},
 number = {1},
 URL = {http://www.theoryofcomputing.org/articles/v008a001},
}