E. B. de Carvalho, “A crítica ambiental de Max von Lassberg e Reinhard Maack: homens do seu tempo (The environmental critique of Max von Lassberg and Reinhard Maack: men of their time) - DOI: 10.5752/P.2237-8871.2012v13n19p32”, Cad. Hist., vol. 13, nº 19, p. 32–52, out. 2012.