Catalin Dohotaru, Peter Høyer. Exact quantum lower bound for grover's problem. Quantum Information & Computation, 9(5):533-540, 2009. [doi]
@article{DohotaruH09,
title = {Exact quantum lower bound for grover's problem},
author = {Catalin Dohotaru and Peter Høyer},
year = {2009},
url = {http://portal.acm.org/citation.cfm?id=2011803},
researchr = {https://researchr.org/publication/DohotaruH09},
cites = {0},
citedby = {0},
journal = {Quantum Information & Computation},
volume = {9},
number = {5},
pages = {533-540},
}