References:

1. Wade Roush, " 'Smart' Genes Use Many Cues to Set Cell Fate," Science, Vol. 272, 5/3/96, p. 652.
2. Nigel Williams. "Yeast Genome Sequence Ferments New Research." Science, 4/26/96, Vol.272, p.481
3. Christiane Nusslein-Volhard. "Gradients That Organize Embryo Development," Scientific American, Vol. 275:2, August 1996, p. 54.