1. T. Asai, in: T. Asai (Ed.), Acetic Acid Bacteria, Univ. Tokyo Press, Tokyo, 1968, p. 124.
2. K. Matsushita, H. Toyama, O. Adachi, in: A.H. Rose, D.W. Tempest (Eds.), Adv. Microbiol. Physiol., Vol. 36, Academic Press, London, 1994, p. 247.
3. G.E. Gray, US Patent, 1945, 2,421,611.
4. G.E. Gray, US Patent, 1945, 2,421,612.