@article{v005a005,
 author = {Andrew M. Childs and Richard Cleve and Stephen P. Jordan and David Yonge-Mallo},
 title = {Discrete-Query Quantum Algorithm for NAND Trees},
 year = {2009},
 pages = {119-123},
 doi = {10.4086/toc.2009.v005a005},
 publisher = {Theory of Computing},
 journal = {Theory of Computing},
 volume = {5},
 number = {1},
 URL = {http://www.theoryofcomputing.org/articles/v005a005},
}