1. 1 O. Aas, and R.B. Ditton (1998 ) Human dimension perspectives on recreational fisheries management . In: P. Hickley & H. Tompkins (eds)Recreational Fisheries. Social, Economic and Management Aspects. Oxford: Fishing News Books, Blackwell Science, pp. 153-164.
2. Threats imposed by water resource development schemes on the conservation of endangered fish species in the Guadiana River Basin in Portugal
3. 3 M.J. Collares-Pereira, A.M. Pires, M.M. Coelho, and I.G. Cowx (1998 ) Towards a conservation strategy forAnaecypris hispanica, the most endangered non-migratory fish in Portuguese streams . In: I.G. Cowx (ed.)Stocking and Introduction of Fish. Oxford: Fishing News Books, Blackwell Science, pp. 437-449.
4. 4 I.G. Cowx (1998 ) Aquatic resources planning for resolution of fisheries management issues . In P. Hickley & H. Tompkins (eds)Recreational Fisheries. Social, Economic and Management Aspects. Oxford: Fishing News Books. Blackwell Science, pp. 97-105.
5. 5 I.G. Cowx, and M.J. Collares-Pereira (2000 ) Conservation of endangered fish species in the face of water resource development schemes in the Guadiana River, Portugal: harmony of the incompatible . In I.G. Cowx (ed.)Management and Ecology of River Fisheries. Oxford: Fishing News Books, Blackwell Science, pp. 428-438.