1931, Ezra Bowen, An hypothesis of population growth‎Among unicellulars, the rate of increase is beyond belief.
1986, Johan A J Metz, O Diekmann, The dynamics of physiologically structured populations‎In unicellulars the uncoupling of the various nutritional and energy sources is much more widely spread.
2006, J Arthur Thomson, Heredity‎More or less distinct specialisation of reproductive elements in some unicellulars.
