1. Bakkeren G, Kronstad JW (1993) Conservation of the b mating-type gene complex among bipolar and tetrapolar smut fungi. Plant Cell 5:123–136
2. Banuett F (1992) Ustilago maydis, a blight that is a delight: good to eat and great to think about. Trends Genet 8:174–180
3. Buller AHR (1931) Researches on fungi, vol IV. Longmans Green, London
4. Bürglin TR (1993) A comprehensive survey of homeo-domain sequences and associated motifs. In: Deboule D (ed) A guidebook for homeobox genes. Oxford University Press, Oxford (in press)
5. Casselton LA, Mutasa ES, Tymon A, Mellon FM, Little PFR, Taylor S, Bernhagen J, Stratmann R (1989) The molecular analysis of basidiomycete mating type genes. In: Nevalainen H, Penttilä M (eds) Proceedings EMBO-Alko workshop on molecular biology of filamentous fungi, Helsinki. Found Biotech Ind Ferm Res 6:139–148