1. S. Liaaen-Jensen and A. Jensen, this series, Vol. 23, p. 586.
2. G. Britton, this series, Vol. 111, p. 113.
3. The Photosynthetic Bacteria;Liaaen-Jensen,1978
4. The Photosynthetic Bacteria;Schmidt,1978
5. Erythrobacter longus gen. nov., sp. nov., an Aerobic Bacterium Which Contains Bacteriochlorophyll a