REFERENCES
- Atanassov A., Brown D. (1984) Plant Cell Tissue Organ Cult., 3, 149–162.
- Baker C., Wertzein H. (1994) Plant Cell Tissue and Organ Cult., 36, 361–368.
- Blajev V., Krachounov I., Mishev K., Ilieva A., Carlier L. (1998) Comparative study of productivity and quality of Bulgarian lucerne varieties. Bulgarian-Flemish workshop on improvement of forge quality, Pleven, Bulgaria.
- Briskin D., Hanson J. (1992) J. Expt. Bot., 43, 269–289.
- Brown D., Atanassov A. (1985) Plant Cell, Tissue and Organ Cult., 4, 111–222.
- Crea M., Bellucci M., Damiani F., Arcioni S. (1995) Euphytica, 81, 51–155.
- Chengalrayan K., Mhaske V., Harza S. (1997) Plant Cell Rep., 16, 783–786.
- Dahmer M., Hildebrand D., Collins G. (1992) In vitro Cell Dev. Biol., 28P, 106–111.
- Denchev P., Atanassov A. (1988) Unconventional methods in lucerne breeding. In: Inst. Extension Service (Z. Staszewski, A. Utrata, eds.), Poland, 17–21
- Denchev P., Velcheva M., Atanassov A. (1991) Plant Cell Rep., 10, 338–341.
- Dudits D., Györgyey J., Bögre L., Bakó L. (1995) Molecular biology of somatic embryogenesis. In Vitro Embryogenesis in Plants, (T. Thorpe, Ed.), 267–308.
- Fuentes S., Suarez R., Villegas T., Acero L., Hernendez G. (1993) Plant Cell Tissue and Organ Cult., 34, 299–302.
- Gamborg O., Miller R., Ojima K. (1968) Exp. Cell Res., 50, 151–158.
- Greinwald R., Czygan C. (1991) Bot. Acta, 104, 64–67.
- Hernandez-Fernandez M., Christie R. (1989) Genome, 32, 318–321.
- Hoffman B., Trin H., Leung J., Kondorosi A. (1997) Mol. Plant Micro Interact., 10, 307–315.
- Iantcheva A., Vlahova M., Trinh T., Brown S., Slater A., Elliott M., Atanassov A. (2001) Plant Sci., 160, 621–627.
- Ivanova A., Velcheva M., Denchev P., Atanassov A., Van Onckellen H. (1994) Physiol. Plant., 92, 85–89.
- Kielly A., Bowley R. (1992) Genom, 35, 474–477.
- Krochko J., Pramanik K., Bewley J. (1992) Plant Physiol., 99, 46–53.
- Lai F., McKersie B. (1994) Plant Sci., 103, 209–221.
- McKersie B., Bowley S. (1998) Crop Science Society of America, Special Publication No. 26, 117–134.
- McKirsie B., Senaratana T., Bowley S., Brown D., Krochko J., Bewely J. (1989) In Vitro Cell Dev. Biol., 25, 1183–1188.
- Meijer M., Brown A. (1987) Plant Cell Tissue Organ Cult., 10, 11–20.
- Murashige T., Skoog F. (1962) Physiol. Plant., 15, 473–497.
- Nolan K., Rose R., Gorst J. (1989) Plant Cell Rep., 8, 278–281.
- Parrott A., Durham E., Bailey A. (1995) Somatic embryogenesis of leguems. In Biotechnology in Agriculture and Forestry, Somatic Embryoigenesis and Synthetic Seeds II, (Y.P.S. Bajaj, Ed.), Spriger-Verlag, Berlin, Vol. 31, 199–227.
- Pezzotti M., Arcioni S., Mariotti D. (1984) Genet Agric., 38, 195–208.
- Phang J. (1985) Curr. Top. Cell Regul., 25, 92–132.
- Poulsen B., Frugis G., Albrechtsen M., Mariotti D. (1996) Plant Cell Tissue and Organ Cult., 44, 257–260.
- Reisch B., Bingham T. (1980) Plant Sci Lett., 20, 71–77.
- Saunders J., Bingham E. (1972) Crop Sci., 12, 804–808.
- Schenk R., Hildebrandt A. (1972) Can. J. Bot. 50, 199–204.
- Shao C-Y., Russinova E., Iantcheva A., Atanassov A., McCormac A., Chen D.—Elliott M., Slater A. (2000) Plant Growth Regul., 31, 155–166.
- Steward F., Mapes M., Kent A., Holsten R. (1964) Science, 143, 20–27.
- Stuart A., Strickland G. (1984) Plant Sci. Lett., 34, 165–174.
- Trinh T., Patel P., Kondorosi K., Durand P., Kamate K., Baner P., Kondorosi A. (1998) Plant Cell Rep., 17, 345–355.
- Vergara R., Verde F., Pitto L., LoSchiao F., Terzi M. (1990) Plant Cell Rep., 8, 697–701.
- Walker K., Sato S. (1981) Plant Cell Tissue Organ Cult., 1, 109–121.