[Brown R, Ferguson J, Lawrence M & Lees D 1987: Tracks and signs of the birds of Britain and Europe. Christopher Helm, London.]Search in Google Scholar
[Chodkiewicz T, Kuczyński L, Sikora A, Chylarecki P, Neubauer G, Ławicki Ł & Stawarczyk T 2015: Ocena liczebności populacji ptaków lęgowych w Polsce w latach 2008–2012 [Population estimates of breeding birds in Poland in 2008–2012]. Ornis Polonica 56: 149–189. [in Polish with English abstract]]Search in Google Scholar
[Domaszewicz A, Mikusek R & Sikora A 2007: Włochatka – Aegolius funereus. [Boreal owl – Aegolius funereus], 280–281. In: Sikora A, Rohde Z, Gromadzki M, Neubauer G & Chylarecki P (eds), Atlas rozmieszczenia ptaków lęgowych polski 1985–2004 [The atlas of breeding birds in Poland 1985–2004]. Bogucki Wydawnictwo Naukowe, Poznań. [in Polish with English abstract]]Search in Google Scholar
[Jenni L & Winkler R 1994: Moult and ageing of European passerines. Academic Press, London.]Search in Google Scholar
[Jędrzejewska B & Jędrzejewski W 2001: Ekologia zwierząt drapieżnych Puszczy Białowieskiej [Ecology of raptors in Białowieża Primeval Forest]. PWN, Warsaw. [in Polish with English summaries]]Search in Google Scholar
[Korpimäki E & Hakkarainen H 2012: The boreal owl: ecology, behaviour and conservation of a forest-dwelling predator. Cambridge University Press, Cambridge.10.1017/CBO9780511844164]Search in Google Scholar
[Levins R 1968: Evolution in changing environments. Princeton University Press, Princeton.10.1515/9780691209418]Search in Google Scholar
[Pucek Z 1984: Keys to vertebrates of Poland. Mammals. PWN, Warsaw.]Search in Google Scholar
[Pugacewicz E 1997: Ptaki lęgowe Puszczy Białowieskiej [Breeding birds of Białowieża Forest]. PTOP, Białowieża. [in Polish]]Search in Google Scholar
[Rahbek C 1995: The elevational gradient of species richness: a uniform pattern? Ecography 18: 200–205. DOI: 10.1111/j.1600-0587.1995.tb00341.x.10.1111/j.1600-0587.1995.tb00341.x]Open DOISearch in Google Scholar
[Rajković D 2018: Diet composition and prey diversity of Tengmalm’s owl Aegolius funereus (Linnaeus, 1758; Aves: Strigidae) in central Serbia during breeding. Turkish Journal of Zoology 42: 346–351. DOI: 10.3906/zoo-1709-28.10.3906/zoo-1709-28]Open DOISearch in Google Scholar
[Sulkava P & Sulkava S 1971: Die nistzeitliche Nahrung des Rauhfusskauzes Aegolius funereus in Finland 1958–67. Ornis Fennica 48: 117–124.]Search in Google Scholar
[Terraube J & Arroyo B 2011: Factors influencing diet variation in a generalist predator across its range distribution. Biodiversity and Conservation 20: 2111–2131. DOI: 10.1007/s10531-011-0077-1.10.1007/s10531-011-0077-1]Open DOISearch in Google Scholar
[Tumiel T, Białomyzy P, Grygoruk G, Korniluk M, Świętochowski P, Wereszczuk M & Skierczyński M 2013: Cenne i nieliczne ptaki lęgowe na Obszarze Specjalnej Ochrony Puszcza Knyszyńska [Valuable and scarce breeding birds of the Special Protection Area Knyszyn Forest]. Ornis Polonica 54: 170–186. [in Polish with English abstract]]Search in Google Scholar
[Zárybnická M, Riegert J & Šťastný K 2013: The role of Apodemus mice and Microtus voles in the diet of the Tengmalm’s owl in Central Europe. Population Ecology 55: 353–361. DOI: 10.1007/s10144-013-0367-4.10.1007/s10144-013-0367-4]Open DOISearch in Google Scholar