@book{252790,
	author = {Menezes, K.A.S.},
	title = {Genetic variability and symbiotic efficiency of Erythrina velutina Willd. root nodule bacteria from the semi-arid region in Northeastern Brazil},
	url = {http://www.scielo.br/pdf/rbcs/v41/0100-0683-rbcs-18069657rbcs20160302.pdf}
}