Day, J. G., Benson, E. E., Harding, K., Knowles, B., Idowu, M., Bremner, D., Watt, S., Santos, L. M. A., Santos, M. F., Friedl, T., Lorenz, M., Lukešová, A., Elster, J., Lukavský, J., Herdman, M., Rippka, R., Hedoin, H., Hall, T. The use of cryopreservation to develop a European scientific and biotechnological resource: The COBRA project. In: Biological Resource Centres and the Use of Microbes. 22nd ECCO Meeting, Proceedings book. Braga: Micoteca da Universidade do Minho, 2003, s. 307-320. ISBN 972-97916-3-5.