1. Blakeslee, A. F., Belling, J., Farnham, M. E.: Inheritance in tetraploid Daturas. Bot. Gaz. 76, 319?373 (1923).
2. Burnham, C. R.: Discussions in Cytogenetics. Minneapolis: Burgess Publishing Co. 1962.
3. Catcheside, D. G.: Double reduction and numerical non-disjunction in maize. Heredity 10, 205?218 (1956).
4. Catcheside, D. G.: Segregation in tetraploid potatoes. Heredity 13, 403?407 (1959).
5. Doyle, G. G.: Preferential pairing in trisomics sof Zea mays. In: Chromosomes Today vol. 2, 12?20. Edinburgh: Oliver and Boyd 1969.