1. Multivariate dispersion as a measure of beta diversity;Anderson;Ecology Letters,2006
2. Impact of military activities on bird species considered to benefit from disturbances: An example from an active military training area in Latvia;Aunins;Ornis Fennica,2018
3. Bird census techniques;Bibby,2000
4. Bogaart, P., van der Loo, M., & Pannekoek, J. (2020). rtrim: Trends and Indices for Monitoring Data. R package version 2.1.1. https://CRAN.R-project.org/package=rtrim.
5. Numerical ecology in R;Borcard,2018