Reference

Lechoslaw Kuczynski, Piotr Tryjanowski, Marcin Antczak, Maciej Skoracki, Martin Hromada (2003): Repeatability of Measurements and Shrinkage after Skinning: the Case of the Great Grey Shrike Lanius excubitor – Bonn zoological Bulletin - früher Bonner Zoologische Beiträge. – 51: 127 - 130.