Citation
Frei, E., Schuh, R., Baumgartner, S., Burri, M., Noll, M., Jurgens, G., Seifert, E., Nauber, U., Jackle, H. (1988). Molecular characterization of spalt, a homeotic gene required for head and tail development in the Drosophila embryo. EMBO J. 7(1): 197--204.