Garrido, E., Voß, U., Müller, P., Castillo-Lluva, S., Kahmann, R., & Pérez-Martíin, J. (2004). The induction of sexual development and virulence in the smut fungus Ustilago maydis depends on Crk1, a novel MAPK protein. Genes and Development, 18:, pp. 3117-3130.