Interaction of central subgerminal ooplasm with the elementary tissues (endophyll, Rauber's sickle and upper layer) of unincubated avian blastoderms in culture Marc Callebaut, Emmy Van Nueten, Hilde Bortier and Femand HarrissonReprod. Nutr. Dev., 39 5-6 (1999) 589-605DOI: https://doi.org/10.1051/rnd:19990506