Horowitz, Arão, and Humberto da Silveira Dantas. 2014. “Hot-Water Soluble Boron in the ‘Zona Litoral-Mata’ Soils of the State of Pernambuco”. Pesquisa Agropecuaria Brasileira 8 (7):163-68. https://doi.org/10.1590/S1678-3921.pab1973.v8.17504.