@book{bookcb6d7313,
title   = {Matematica: segundo grau},
author = {Iezzi, Gelson and Dolce, Osvaldo and Teixeira, J C and Machado, Nílson José, and Goulart, Marcio Cintra and Castro, L R S and Machado, Antonio dos Santos},
year = {1991},
publisher = {Atual}
}