Lehikoinen, A., Lindén, A., Karlsson, M., Andersson, A., Crewe, T. L., Dunn, E. H., Gregory, G., Karlsson, L., Kristiansen, V., Mackenzie, S., Newman, S., Røer, J. E., Sharpe, C., Sokolov, L. V., Steinholtz, Å., Stervander, M., Tirri, I. S.
& Tjørnløv, R. S. (2019).
Phenology of the avian spring migratory passage in Europe and North America: Asymmetric advancement in time and increase in duration.
Ecological Indicators,
101(June), 985-991.
https://doi.org/10.1016/j.ecolind.2019.01.083
Post, E., Boving, P., Cahoon, S., Kerby, J.
, Høye, T. T., Forchhammer, M. C., Sullivan, P. & Welker, J. (2011).
Phenology as an integrator of ecological dynamics. Abstract from American Geophysical Union, San Fransisco, United States.