1. Landsmann, J. 1984. Molekulare Analyse somaklonaler Varianten bei Solanum tuberosum. Inaugural Dissertation zur Erlangung des Doktorgrades der Mathematisch-Naturwissenschaftlichen. Facultat der Universität zu Köln.
2. Maniatis, T., Fritsch, E. and Sambrook, J. 1982. Molecular cloning a laboratory manual. Cold Spring Harbor Laboratory, 545p.
3. Southern, E. 1975. Detection of specific sequences among DNA fragments separated by gel electrophoresis. J. Mol. Biol., 98, 503.
4. Sree Ramulu, K., Dijkhuis, P., Bredemeijer, G.M.M., Burg, H.C.J. , Roest, S., Bahelmann, G.S., Hanisch Ten Cate, Ch. H., Ennik, L. 1983. Protoclonal variation in a butch commercial cultivar of potato (Solanum tuberosum L, cv. Bintje) p 148–149 In poster proceedings of the 6th International Protoplast proceedings (Ed. by Potrykus Basel, Boston, Stuttgart) (Experientia: suppl. vol 45).
5. Viera, J. and Messing, J. 1982. The pUC plasmids, an M13 mp7-derived system for insertion mutagenesis and sequencing with synthetic universal primers. Gene, 19, 259–268.