@book{50985,
	author = {MACHADO, ANTONIO DOS SANTOS, 1948},
	title = {CONJUNTOS NUMERICOS E FUNCOES},
	publisher = {ATUAL},
	year = {C1991},
	address = {SAO PAULO},
	edition = {2 ed.},
	url = {https://www.santoandre.sp.gov.br/pesquisa/con_detalhe.asp?ID=63863&vHistoryNovo=sim}
}