@article{1183532212,
author = {Brooks, R.},
title = {The number of roots of $f\left( x \right) = a$},
journal = {Bull. Amer. Math. Soc.},
volume = {76},
number = {4},
year = {1970},
pages = { 1050-1052},
language = {en},
url = {http://dml.mathdoc.fr/item/1183532212}
}
Brooks, R. The number of roots of $f\left( x \right) = a$. Bull. Amer. Math. Soc., Tome 76 (1970) no. 4, pp. 1050-1052. http://gdmltest.u-ga.fr/item/1183532212/