1. Davis, B.J. (1964): Disc electrophoresis. II. Method and application to human serum proteins. Ann. N. Y. Acad. Sci. 121, 404–427
2. Hansson, B. (1978): Temperaturchocker — ett sätt att kraftigt höja frekvensen embryoidbildningar vid antherkultur av raps (Brassica napus). Sver. Utsädesfören. Tidskr. 88, 141–148
3. Hoffmann, F. (1978): Mutation and selection of haploid cell culture systems of rape and rye. In: Production of Natural Compounds by Cell Culture Methods (eds. Alfermann, A.W.; Reinhard, E.), pp. 319–329. München: Ges. f. Strahlen- und Umweltforsch.
4. Hoffmann, F. (1980): Pflanzliche Zellkulturtechniken als Züchtungsschritt am Beispiel Raps. Naturwissenschaften 67, 301–306
5. Hoffmann, F.; Schenck, H.; Kohlenbach, H.W.; Gleba, Y.Y. (1980): Regeneration and fusion of protoplasts from important crop plants of the Brassiceae. In: Advances in Protoplast Research (eds. Ferenczy, L.; Farkas, G.L.), pp. 287–292. Oxford: Pergamon Press