Schwiertz, Andreas, ed. (2016). Microbiota of the Human Body: Implications in Health and Disease. Advances in Experimental Medicine and Biology. Vol. 902. Cham: Springer International Publishing. p. 120. doi:10.1007/978-3-319-31248-4. ISBN978-3-319-31246-0. S2CID28970333.
Schwiertz, Andreas, ed. (2016). Microbiota of the Human Body: Implications in Health and Disease. Advances in Experimental Medicine and Biology. Vol. 902. Cham: Springer International Publishing. p. 120. doi:10.1007/978-3-319-31248-4. ISBN978-3-319-31246-0. S2CID28970333.