Lukowitz, W., Schröder, C., Glaser, G., Hülskamp, M., & Tautz, D. (1994). Regulatory
and coding regions of the segmentation gene hunchback are functionally conserved between Drosophila virilis and Drosophila
melanogaster. Mechanisms of Development, 45(2), 105-115.
doi:10.1016/0925-4773(94)90024-8.