@article{DBLP:journals/toplas/ButlerH99,
author = {Michael J. Butler and
Pieter H. Hartel},
title = {Reasoning about Grover's quantum search algorithm using
probabilistic {\it wp}},
journal = {ACM Trans. Program. Lang. Syst.},
volume = {21},
number = {3},
year = {1999},
pages = {417-429},
ee = {http://doi.acm.org/10.1145/319301.319303},
bibsource = {DBLP, http://dblp.uni-trier.de}
}