1. ABOU-ZIED, E.N. 1973. The seasonal variations of growth and volatile oil in the two introduced types of Majorana hortensis Mnch., grown in Egypt. Pharmazie 28: 55–56.
2. ANDREWS, A.C. 1961. Hyssop in the classical era. Class. Philology 56: 230–248.
3. BAXTER, J.W. & G.B. CUMMINS. 1953. Physiologic specialization in Puccinia menthae Pers., and notes on epiphytology. Phytopathology 43: 178–180.
4. BENTHAM, G. 1934. Labiatarum Genera et Species etc.: 333–339. Ridgway, London.
5. BENTHAM, G.1836. Labiatae orientales etc. Ann. Sc. Nat. 2(6): 43.