Rothe, M., Wimmer, E. A., Pankratz, M. J., Gonzalez-Gaitan, M., & Jaeckle, H. (1994). Identical transacting factor requirement for knirps and knirps-related Gene expression in the anterior but not in the posterior region of the Drosophila embryo. Mechanisms of Development, 46(3), 169-181.