A. Mekhaldi, M. Benkhelifa and M. Belkhodja
International Journal of Botany 4 ( 3 ): 269 - 275 , 2008
M. Benkhelifa, M. Belkhodja, Y. Daoud and D. Tessier
Pakistan Journal of Biological Sciences 11 ( 1 ): 17 - 25 , 2008