@article{05242343,
title = {Some hardness results for question/answer games.},
journal = {Integers},
volume = {7},
year = {2007},
zbl = {1194.68125},
language = {en},
url = {http://dml.mathdoc.fr/item/05242343}
}
Abbasi, Sarmad; Sheikh, Numan. Some hardness results for question/answer games.. Integers, Tome 7 (2007) . http://gdmltest.u-ga.fr/item/05242343/