Betula pendula var. carelica (Merckl.) L.Hämet-Ahti . EKI terminibaas Esterm. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//esterm/Betula%20pendula%20var.%20carelica%20%28Merckl.%29%20L.H%C3%A4met-Ahti/1/lat (21.06.2026)