1. BARTON, D. W. 1950. Pachytene morphology of the tomato chromosome complement. Amer. J. Bot., 37, 639–643.
2. BARTON, D. W. 1954. Comparative effects of X-ray and ultra-violet radiation on the differentiated chromosomes of the tomato. Cytologic19, 157–175.
3. BELLING, J. 1928. Contraction of chromosomes during maturation divisions in Lilium and other plants. Univ. Calif. Publ. Bot., 14, 335–343.
4. BROWN, M. S. 1954. A comparison of pachytene and metaphase pairing in species hybrids of Gossypium. Genetics, 3g, 962–963.
5. BROWN, S. W. 1949. The structure and meiotic behaviour of the differentiated chromosomes of tomato. Genetics, 34, 437–461.