Suhonen, Jukka, and Jukka Jokimaki. “Long-Term Species Richness-Abundance Dynamics in Relation to Species Departures and Arrivals in Wintering Urban Bird Assemblages”. European Journal of Ecology, vol. 5, no. 1, July 2019, pp. 1-10, https://doi.org/10.2478/eje-2019-0002.