1. Armstrong, C.L. (1986) ‘Genetic and cytogenetic stability of maize tissue cultures: A comparative study of organogenic and embryogenic cultures’, Ph.D. thesis, University of Minnesota.
2. Armstrong, C.L. and Phillips, R.L. (1988) ‘Genetic and cytogenetic variation in plants regenerated from organogenic and friable, embryogenic tissue cultures of maize’, Crop Sci., 28, 363–369.
3. Bennetzen, J.L. (1987) ‘Covalent DNA modification and the regulation of Mutatorelement transposition in maize’, Mol. Gen. Genet., 208, 45–51.
4. Benzion, G. and Phillips, R.L. (1988) ‘Cytogenetic stability of maize tissue cultures": A cell line pedigree analysis’, Genome, 30, 318–325.
5. Bianchi, A., Salamini, F., and Parlavecchio, R. (1969) ‘On the origin of controlling elements in maize’, Genet. Agrar., 22, 335–344.