1. Ballance, D.J., and Turner, G. (1985): Development of a high-frequency transforming vector for Aspergillus nidulans. Gene 36: 321–331.
2. Beri, R.K., and Turner, G. (1987): Transformation of Penicillium chrysogenum using the Aspergillus nidulans amdS gene as selectable marker. Curr.Genet. 11: 639–641.
3. Boel, E., Christensen, T., and Woldike, H.F. (1987). European Patent No. 0238023A2.
4. Bovenberg, R., van Solingen, P., Kattevilder, F., Groenen, M., and Veenstra, A. (1989): Cloning and characterization of the acyltransferase gene of Penicillium chrysogenum. in EMBO-ALKO workshop on Molecular Biology of Filamentous Fungi. 2-7, 7, 1989.
5. Brown, T.A. (1990) Gene cloning: an introduction. Van Nostrand Reinhold (UK) Co. Ltd.