1. Arora O. P. & KhoshooT. N., 1969. Primary trisomics in Moss Verbena. Euphytica 18: 237?248.
2. Blakeslee A. F., 1922. Variations in Daturas due to changes in chromosome number. Am. Nat. 55: 16?31.
3. Briggs B. G., 1973. Chromosomal studies on Plantago in Australia. Contr. N.S.W. natn. Herb. 4: 399?405.
4. Brown M. J. & JacksonW. D., 1982. IOPB chromosome number report I.XXV. Taxon 31: 367?368.
5. Burnham C. R., 1962. Discussion in cytogenetics. Burgess Publishing Co., Minnesota.