European Commission. (1997). Council directive 93/89/EEC of 25 October 1993 on the application by member states of taxes on certain vehicles used for carriage of goods by road and tolls and charges for the use of certain infrastructures: : 11 languages. Luxembourg: Office for Official Publications of the European Communities.

European Commission. Council Directive 93/89/EEC of 25 October 1993 On the Application By Member States of Taxes On Certain Vehicles Used for Carriage of Goods By Road and Tolls and Charges for the Use of Certain Infrastructures: : 11 Languages. Luxembourg: Office for Official Publications of the European Communities, 1997.

European Commission. Council Directive 93/89/EEC of 25 October 1993 On the Application By Member States of Taxes On Certain Vehicles Used for Carriage of Goods By Road and Tolls and Charges for the Use of Certain Infrastructures: : 11 Languages. Luxembourg: Office for Official Publications of the European Communities, 1997.