1. Ackerman LGJ, Vanwyk PJ, Du Plassis LM (1975) Some aspects of the composition of the Kalhari truffle of N’abba. South Afr Food Rev 2:145-147
2. Ahmed AA, Mohammed MA, Hami MA (1981) Libyan truffles “Terfezia boudieri Chatin”. Chemical composition and toxicity. J Food Sci 11:145-147
3. Al-Delaimy KS (1977) Protein and amino acid composition of truffles. Can Inst Food Sci Technol J 10:221-222
4. Awameh M, Alsheikh A (1978) Laboratory and field study of four kinds of truffle (Kamah), Terfezia and Tirmania species for cultivation. Mushroom Sci X2:507-517
5. Awameh M, Alsheikh A, Ghawas S (1979) Mycorrhizal synthesis between Helianthemum ledifolium, H. salicifolium and four species of Terfezia and Tirmania using ascospores and mycelial cultures obtained from ascospores germination. Proceedings 4th North American Conference on Mycorrhizae. Fort Collins Colorado, USA