1. Bentzer, B.V., Bothmer, R., Engstrand, L., Gustafsson, M., Snogerup, S.: Some sources of error in the determination of arm ratios of chromosomes. Botanisker Notiser 124, 65?74 (1971)
2. Coates, D.J., James, S.H.: Chromosome variation in Stylidium crossocephalum F.Muell (Angiospermae: Stylidiaceae) and the dynamic coadaptation of its lethal system. Chromosoma (Berl.) 72, 357?376 (1978)
3. Essad, S., Arnoux, J., Maia, N.: Contrôle de validité des caryogrammes. Application au caryotype de Lolium perenne L. Chromosoma (Berl.) 20, 202?220 (1966)
4. Matern, B., Simak, M.: Statistical problems in karyotype analysis. Hereditas (Lund) 59, 280?288 (1968)
5. Matern, B., Simak, M.: On some statistical problems connected with the identfication of chromosomes. Res. Notes Dep. Forestry Biometry, Roy. Coll. Forestry (Stockholm) 1, 1?81 (1969)