5.
Iqbal M.S., Ghafoor A., Qureshi A.S., Ahmad Z. (2005) Biodiversity and cultivation potential of black cumin (Nigella sativa L.). [in:] International symposium: Medicinal plants: linkages beyond national boundaries. Eds. Shinwari Z.K., Watanaba T., Ali M., Anwar R. National Agricultural Research Centre, Islamabad 12: 105-116.