1. Abzhanov A (2013) von Baer’s law for the ages: lost and found principles of developmental evolution. Trends Genet 29:712–722
2. Adams RJ, Kimmel C (2004) Morphogenetic cellular flows during zebrafish gastrulation. Cold Spring Harbor Laboratory Press, Cold Spring Harbor, NY
3. Agius E, Oelgeschlager M, Wessely O, Kemp C, De Robertis EM (2000) Endodermal Nodal-related signals and mesoderm induction in Xenopus. Development 127:1173–1183
4. Albano RM, Arkell R, Beddington RS, Smith JC (1994) Expression of inhibin subunits and follistatin during postimplantation mouse development: decidual expression of activin and expression of follistatin in primitive streak, somites and hindbrain. Development 120:803–813
5. Albano RM, Godsave SF, Huylebroeck D, Van Nimmen K, Isaacs HV, Slack JM, Smith JC (1990) A mesoderm-inducing factor produced by WEHI-3 murine myelomonocytic leukemia cells is activin A. Development 110:435–443