1. African-Eurasian Migratory Waterbirds (AEWA) (1999) Resolution 1.14 Phasing out of lead shot in wetlands. First meeting of the parties to the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA), 6–9 November 1999, Cape Town, South Africa. http://www.unep-aewa.org/meetings/en/mop/mop1_docs/pdf/r14.pdf . Accessed online 2 April 2012
2. African-Eurasian Migratory Waterbirds (AEWA) (2002) Resolution 2.2 Phasing out of lead shot for hunting in wetlands. Second meeting of the parties to the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA), 25–27 September 2002, Bonn, Germany. http://www.unep-aewa.org/meetings/en/mop/mop2_docs/resolutionsword/pdf/resolution2_2.pdf . Accessed online 2 April 2012
3. African-Eurasian Migratory Waterbirds (AEWA) (2008) Resolution 4.1 Phasing out of lead shot for hunting in wetlands. Fourth meeting of the parties to the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA), 15–19 September 2008, Antananarivo, Madagascar. http://www.unepaewa.org/meetings/en/mop/mop4_docs/final_res_pdf/res4_1_phasing_out_lead_shot_final.pdf . Accessed online 2 April 2012
4. Anderson WL, Havera SP, Zercher BW (2000) Ingestion of lead and nontoxic shotgun pellets by ducks in the Mississippi Flyway. J Wildl Manag 64:848–857
5. Avery D, Watson RT (2009) Regulations of lead-based ammunition around the world. In: Watson RT, Fuller M, Pokras M, Hunt WG (eds) Ingestion of lead from spent ammunition: implications for wildlife and humans. The Peregrine Fund, Boise