Giehl, C.J., Chuquillanque, D.A., Porto, C.R.P., Dias, E.A. and Stumpf, M.T. 2021. Azolla production as a protein source to poultry: a case study in family poultry farmers in Rio Grande do Sul, Brazil. Revista Verde de Agroecologia e Desenvolvimento Sustentável. 16, 3 (Jul. 2021), 321–325. DOI:https://doi.org/10.18378/rvads.v16i3.8314.