Fuentes-Ram?rez LE, Bustillos-Cristales R, Tapia-Hern?ndez A, Jim?nez-Salgado T, Wang ET, Mart?nez-Romero E, Caballero-Mellado J. Novel nitrogen-fixing acetic acid bacteria, Gluconacetobacter johannae sp. nov. and Gluconacetobacter azotocaptans sp. nov., associated with coffee plants. Int J Syst Evol Microbiol. 2001 Jul;51(Pt 4):1305-1314.