Araújo, P.N., Guimarães, A.L.A., Moura, M.R.L. e Vieira, A.C. de M. 2021. Quality control of commercial samples of “arnica” (Arnica montana and Solidago chilensis) from Rio de Janeiro, Brazil. Revista Agrogeoambiental. 13, 1 (maio 2021). DOI:https://doi.org/10.18406/2316-1817v13n120211561.