1Peter Borkey and Francois L e v e que, Working Party on proaches For Environmental Police Integration Voluntary Approaches For Environmental Protection In The European Union,(1998)P4.
2Steve Baeke Prof_Marc De Clercp Frederik Matthijs, CAVA Working Paper No-99/08/3,The Nature of Voluntary Approaches Empirical Evidence and Patters Literaure Survey, p6.
3Environmental Agreements, The Role and Effect of Environmental Agreements in Environmental Polices. Edited by The Environmental Law Network International, 1998.P 43.
4EEA, European Environment Agency(1997), Environmental Agreements-Environmental Effectiveness,Environmental Issues Series No 3- Vol 1 and 2,Copenhagen.
