1. Akashi R & Adachi T (1992) Plant regeneration from suspension cultured-derived protoplasts of apomictic dallisgrass (Paspalum dilatatum Poir.). Plant Sci. 82: 219–225.
2. Al-Atabee JS, Mulligan BJ & Power JB (1990) Interspecific somatic hybrids of Rudbeckia hirta and Rlaciniata (Compositae). Plant Cell Rep. 8: 517–520.
3. An LJ, Luo XM, Li XW, Li FX, He MY & Hao S (1991) Plant regeneration from mesophyll protoplasts of Astragalus tenuis. Acta Bot. Sinica 33: 38–42.
4. An LJ, Zhang JM, Li FX, Luo XM, He MY & Hao S (1993) Study on high-frequency plant regeneration from monocell suspension cultures of Astragalus grubovii. Acta BotSinica, 35 (Suppl.): 153–156.
5. Arcioni S, Davey MR, dos Santos AVP & Cocking EC (1982) Simatic embryogenesis in tissues from mesophyll and cell suspension protoplasts of Medicago coerulea and M.glutinose. Z. Pflanzenphysiol. 106: 105–110.