VITTE, Antônio Carlos; DA SILVEIRA, Roberison Wittgeinstein Dias. NATUREZA EM ALEXANDER VON HUMBOLDT: entre a ontologia e o empirismo (the nature of Alexander Von Humboldt: between ontology and empiricism).. Mercator, Fortaleza, v. 9, n. 20, p. 179 a 195, jan. 2011. ISSN 1984-2201. Available at: <http://www.mercator.ufc.br/mercator/article/view/413>. Date accessed: 05 june 2020.