1. Ak BE 1992. Effects of different Pistacia spp pollens on the fruit set and quality of Pistachios. PhD Thesis. Adana Turkey: Department of Horticulture Cukurova University Institute of Natural and Applied Science (in Turkish with an English summary).
2. Ak BE 1998. Harvest Systems: Pistachio Harvest in Turkey and Iran. Advanced Course Production and Economics of Nut Crops. Organized by CIHEAM-IAMZ FAO and University of Cukurova Faculty of Agr. Course Notes.
3. Ak BE 2001. Selection criteria of the best pistachio male trees. Nucis 10:24-25.
4. Ak BE Acar I 2001. Pistachio production and cultivated varieties grown in Turkey. International Workshop on Pistachio: Towards a Comprehensive Documentation of Distribution and Use of Its Genetic Diversity in the CWANA Region. Report of the IPGRI Workshop 14-17 December 1998 Irbid Jordan 27-34.
5. Ak BE Acar I Kaska N 1998. An investigation on the male determination for some female varieties throughout five years (1992-1996) grown at Ceylanpinar State Farm in Sanliurfa Conditions. Proceedings of The X. GREMPA Seminar 14-17 October 1996 Meknes (Morocco). Cahiers Options Mediterraneennes 33:99-104.