@article{lin237876,
    title   = {Influence of amino acids on nitrogen fixation ability and growth of Azospirillum spp.},    
    author  = {Hartmann A, Fu HA, Burris RH.},    
    journal = {Appl Environ Microbiol},    
    year    = {1988},    
    doi     = {10.1128/aem.54.1.87-93.1988},    
    pmid    = {2894202}        
    }