1. Høier, E., Janzen, T., Henriksen, C., Rattray, F., Brockmann, E., Johansen, E. (1999) The production, application and action of lactic cheese starter cultures. In: The technology of cheesemaking (Law, B., Ed.), pp.99–131 Academic Press, Sheffield, UK.
2. Cooper, R. (2001) Winning at new products. Product Development Institute Inc., Ancaster, Canada.
3. Johansen E. (2003) Challenges when transferring technology from Lactococcus laboratory strains to industrial strains. Genetics and molecular research 2, 112–116.
4. Johansen, E. (1999) Genetic engineering (b) Modification of bacteria. In: Encyclopedia of food microbiology (Robinson, R., Batt, C., Patel, P., Eds.), pp.917–921 Academic Press, London, UK.
5. Holt, J., Krieg, N., Sneath, P., Staley, J., Williams, S. (1994) Bergey's Manual of Determinative Biology, 9th ed. Williams & Wilkins, Baltimore, USA.