Maamar, H., Raj, A., Dubnau, D., 2007. Noise in gene expression determines cell fate in Bacillus subtilis. Science 317, 526–529. 

McMillen, D., Kopell, N., Hasty, J., Collins, J. J., 2002. Synchronizing genetic relaxation oscillators by intercell signaling. Proc. Natl. Acad. Sci. USA 99, 679–684. 

Milo, R., Itzkovitz, S., Kashtan, N., Levitt, R., Shen-Orr, S., Ayzenshtat, I., Sheffer, M., Alon, U., 2004. Superfamilies of evolved and designed networks. Science 303, 1538–1542. 

Milo, R., Shen-Orr, S., Itzkovitz, S., Kashtan, N., Chklovskii, D., Alon, U., 2002. Network motifs: Simple building blocks of complex networks. Science 298, 824–827. 

Mizuguchi, T., Sano, M., 1995. Proportion regulation of biological cells in globally coupled nonlinear systems. Phys. Rev. Lett. 75, 966–969. 

Novak, B., Tyson, J. J., 1993. Numerical analysis of a comprehensive model of m-phase control in Xenopus oocyte extracts and intact embryos. J. Cell Sci. 106, 1153–1168. 

Oviedo, N. J., Newmark, P. A., Alvarado, A. S., 2003. Allometric scaling and proportion regulation in the freshwater planarian Schmidtea mediterranea. Dev. Dyn. 226, 326–333. 

Radtke, F., Wilson, A., Mancini, S. J. C., MacDonald, R., 2004. Notch regulation of lymphocyte development and function. Nat. Immunol. 5, 247–253. 

R` afols, I., Amagai, A., Maeda, Y., MacWilliams, H. K., Sawada, Y., 2000. Cell type proportioning in Dictyostelium slugs: lack of regulation within a 2.5-fold tolerance range. Differentiation 67, 107–116. 

Sha, W., Moore, J., Chen, K., Lassaletta, A. D., Chung-Seon Yi, J. J. T., Sible, J. C., 2003. Hysteresis drives cell-cycle transitions in Xenopus laevis egg extracts. Proc. Natl. Acad. Sci. USA 100, 975–980. 

Shen-Orr, S. S., Milo, R., Mangan, S., Alon, U., 2002. Network motifs in the transcriptional regulation network of Escherichia coli. Nat. Gen. 31, 64–68. 

