Chamberlain, C. P., Bensch, S., Feng, X., Akesson, S., & Andersson, T. (2000). Stable isotopes examined across a migratory divide in Scandinavian willow warblers (Phylloscopus trochilus trochilus and Phylloscopus trochilus acredula) reflect their African winter quarters.

Chamberlain, C P., S. Bensch, X. Feng, S. Akesson, và T. Andersson. Stable Isotopes Examined Across a Migratory Divide in Scandinavian Willow Warblers (Phylloscopus Trochilus Trochilus and Phylloscopus Trochilus Acredula) Reflect Their African Winter Quarters. 2000.

Chamberlain, C P., et al. Stable Isotopes Examined Across a Migratory Divide in Scandinavian Willow Warblers (Phylloscopus Trochilus Trochilus and Phylloscopus Trochilus Acredula) Reflect Their African Winter Quarters. 2000.