María Gabriela Di Barbaro et al. 2021. Natural Existence of Endorhizospheric Bacteria Free from Atmospheric Nitrogen in the Endorhizosphere of Helianthus tuberosus and Smallanthus sonchifolius. Current Topics in Agricultural Sciences Vol. 2. (Oct. 2021), 8–18. DOI:https://doi.org/10.9734/bpi/ctas/v2/3946F.