Ii asosiy qism

^ Richens, R. H., Qarag'ay (Cambridge 1983) p.155

^ Richens, R. H., Qarag'ay, Ch.10 (Cambridge, 1983)

^ Heybroek, H. M., 'Resistant Elms for Europe' (1982) in Research on Dutch Elm Disease in Europe, HMSO, London 1983

^ Uilkinson, Jerald, Elm uchun epitafiya (London, 1978), p.87

^ Shakespeare, Yoz kechasi tushi, Act 4, Scene 1

^ Janssen, Carolyn. "An elm tree and three sisters (Book Review)". ebscohost. Olingan 21 sentyabr 2012.

^ "Priory of Sion". Crystalinks. Olingan 15 mart 2020.

^ Rackham, O. (1976). Britaniyaning landshaftidagi daraxtlar va o'rmonzorlar J. M. Dent, London.

^ Armstrong, J. V .; Sotish, P. D. (1996). "Britaniyalik qarag'aylarni qayta ko'rib chiqish (Ulmus L., Ulmaceae): tarixiy zamin ". Linnean Jamiyatining Botanika jurnali. 120: 39–50. doi:10.1111 / j.1095-8339.1996.tb00478.x. Arxivlandi asl nusxasidan 2017 yil 26 oktyabrda. Olingan 26 oktyabr 2017.

^ ^a b Richens, Qarag'ay (Kembrij, 1983)

^ elmcare.com/about_elms/history/liberty_elm_boston.htm