1. AFRICAN BUSINESS 1990 No. 140 (April): 29–37.
2. AFRICAN BUSINESS 1991a No. 150 (February): 15–17.
3. AFRICAN BUSINESS 1991b No. 151 (March): 39.
4. AFRICAN ECONOMIC DIGEST 1991 Volume 12 (7 January): 3–4.
5. AFRICA REPORT 1993a July/August: 26–28.