SANTOS, Anadalvo Juazeiro dos et al. ECONOMIC VIABILITY OF COFFEE – GREVILLEA AGROFORESTRY SYSTEM IN NORTHERN STATE OF PARANÁ. CERNE, [S.l.], v. 6, n. 1, p. 089-100, oct. 2015. ISSN 2317-6342. Available at: <http://cerne.ufla.br/site/index.php/CERNE/article/view/488>. Date accessed: 25 oct. 2020.