Joshi, M and Mande, S C and Dikshit, Kanak L  (1998) Hemoglobin biosynthesis in Vitreoscilla stercoraria DW: cloning, expression, and characterization of a new homolog of a bacterial globin gene.  Applied and environmental microbiology, 64 (6).  pp. 2220-8.  ISSN 0099-2240