1997 IUCN red list of threatened plants (1997)

Annals of the Royal Botanic Gardens, Peradeniya - Royal Botanical Gardens, Peradeniya. (Skien, 1919)

Annals of the Royal Botanic Gardens, Peradeniya - Royal Botanical Gardens, Peradeniya. (Skien, 1920)

Annals of the Royal Botanic Gardens, Peradeniya - Royal Botanical Gardens, Peradeniya. (Skien, 1920)

Annals of the Royal Botanic Gardens, Peradeniya - Royal Botanical Gardens, Peradeniya. (Skien, 1920)

Just's Botanischer Jahresbericht - Just, Johann Leopold, 1841 -1891 (Gebruder Borntraeger, 1918)

The World List of Threatened Trees (1998)