VOLSI, B., CASTRO, G.H.L.D., COSTA, G.V.D., SEVERINO, M.F.D.P. and TELLES, T.S. 2020. SPATIAL DISTRIBUTION, EVOLUTION AND STRUCTURE OF MAIZE AND SOYBEAN PRODUCTION SYSTEMS IN STATE OF PARANÁ. REVISTA BRASILEIRA DE MILHO E SORGO. 19, (Oct. 2020), 17. DOI:https://doi.org/10.18512/rbms2020v19e1122.