1. Marginal zone cells — the primitive streak inducing component of the primary hypoblast in the chick;Azar;J. Embryol. Exp. Morphol.,1979
2. Interaction of epiblast and hypoblast in the formation of the primitive streak and the embryonic axis in chick, as revealed by hypoblast rotation experiments;Azar;J. Embryol. Exp. Morphol.,1981
3. The retention of primary hypoblastic cells underneath the developing primitive streak allows for their prolonged inductive influence;Azar;J. Embryol. Exp. Morphol.,1983
4. The rotation of the embryo to the principal axis of symmetry in the birds egg;Bartelmez;Biol. Bull. (Woods Hole, Mass.),1918
5. Studies on the development of the foregut in the chick blastoderm. I. The presumptive foregut area;Bellairs;J. Embryol. Exp. Morphol.,1953