Ireland. Department of Foreign Affairs. (1998). Protocol to the 1979 convention on long-range transboundary air pollution concerning the control of emissions of nitrogen oxides or their transboundary fluxes and technical annex: With declaration concluded at Sofia on 31 October 1988, signed by Ireland on 1 May 1989, entered into force internationally on 14 February 1991, instrument of ratification deposited by Ireland on 17 October 1994, entered into force for Ireland on 15 January 1995. Stationary Office.

Ireland. Department of Foreign Affairs. Protocol to the 1979 Convention on Long-range Transboundary Air Pollution Concerning the Control of Emissions of Nitrogen Oxides or Their Transboundary Fluxes and Technical Annex: With Declaration Concluded at Sofia on 31 October 1988, Signed by Ireland on 1 May 1989, Entered into Force Internationally on 14 February 1991, Instrument of Ratification Deposited by Ireland on 17 October 1994, Entered into Force for Ireland on 15 January 1995. Stationary Office, 1998.