Ots, M. & Paal, U. Rarities in Estonia 2009: Report of the Estonian Rarities Committee
Ellermaa, M., Pettay, T. & Könonen, J. Autumn migration in Põõsaspea Cape in 2009 PDF
Tüür, K. & Labi, K. Terms for ‘wintering’ in Estonian
Notes (in Estonian)