1. Bengtsson, S. 2006. Evaluation of transgenic Campanula carpatica plants. Master's project. Danish-Swedish Horticulture programme. Department of Agriculture Sciences, Swedish University of Agricultural Sciences. p. 6.
2. Bhattacharya, A., and Datta, A. K. 2011. A report on genetic male sterility in Uraria picta (Jacq.) DC. Cytologia 76: 55–62.
3. Budar, F., and Pelletier, G. 2001. Male sterility in plants: occurrence, determinism, significance and use. C R Seances Acad Sci III 324: 543–550.
4. Comai, L., and Cartwright, R. A. 2005. A toxic mutator and selection alternative to the non-Mendelian RNA cache hypothesis for hothead reversion. Plant Cell 17: 2856–2858.
5. Datta, A. K., and Saha, A. 2001. Male sterility in black cumin (Nigella sativa L.). Plant Archives 1: 45–49.