Azotobacteraceae - the taxonomy and ecology of the aerobic nitrogen-fixing bacteria, pp. 347-352. (1979). Academic Press.
Derx, H. G. (1950). <i>Beijerinckia</i>, a new genus of nitrogen-fixing bacteria occurring in tropical soils.. <i> Proc.Kon.Nederl.Akad.Wetensch.Ser.C </i><b> 53 </b>: 140-147 .
Starkey, R. L., De, P. K. (1939). A new species of <i>Azotobacter</i>. <i> Soil Sci. </i><b> 47 </b>: 329-343 .

Derx, H. G. (1950). <i>Beijerinckia</i>, a new genus of nitrogen-fixing bacteria occurring in tropical soils.. <i> Proc.Kon.Nederl.Akad.Wetensch.Ser.C </i><b> 53 </b>: 140-147 .
Thompson, J. P., Skerman, V. B. D., (1979). <i>Azotobacteraceae </i>- the taxonomy and ecology of the aerobic nitrogen-fixing bacteria. Academic Press.
Starkey, R. L., De, P. K. (1939). A new species of <i>Azotobacter</i>. <i> Soil Sci. </i><b> 47 </b>: 329-343 .
Thompson, J. P., Skerman, V. B. D., (1979). <i>Azotobacteraceae </i>- the taxonomy and ecology of the aerobic nitrogen-fixing bacteria. Academic Press.
(1981). Validation of the publication of new names and new combinations previously effectively published outside the IJSB. List No. 6. <i> Int.J.Syst.Bacteriol. </i><b> 31 </b>: 215-218 .

Thompson, J. P., Skerman, V. B. D., (1979). <i>Azotobacteraceae </i>- the taxonomy and ecology of the aerobic nitrogen-fixing bacteria. Academic Press.
Thompson, J. P., Skerman, V. B. D., (1979). <i>Azotobacteraceae </i>- the taxonomy and ecology of the aerobic nitrogen-fixing bacteria. Academic Press.
(1981). Validation of the publication of new names and new combinations previously effectively published outside the IJSB. List No. 6. <i> Int.J.Syst.Bacteriol. </i><b> 31 </b>: 215-218 .

Azotobacteraceae - the taxonomy and ecology of the aerobic nitrogen-fixing bacteria, pp. 347-352. (1979). Academic Press.
Derx, H. G. (1950). Further research on Beijerinckia. Ann.. <i> Bogoriensis </i><b> 1 </b>: 1-11 .
Derx, H. G. (1950). Further researches on <i>Beijerinckia</i>. <i> Ann.Bogor. </i><b> 1 </b>: 1-12 .

Brettar, I., Christen, R., Höfle, M. G. (2004). <i>Belliella baltica</i> gen. nov., sp. nov., a novel marine bacterium of the <i>Cytophaga</i>-<i>Flavobacterium</i>-<i>Bacteroides</i> group isolated from surface water of the central Baltic Sea. <i> Int.J.Syst.Evol.Microbiol. </i><b> 54 </b>: 65-70 .