Bianchet, Paula, et al. “Single and Mixed Formulations of Inoculants With Diazotrophic Bacteria, under Different Nitrogen Rates and on the Paddy Rice Crop”. Semina: Ciências Agrárias, vol. 34, no. 6, Dec. 2013, pp. 2655-66, doi:10.5433/1679-0359.2013v34n6p2655.